1// <forward_list> -*- C++ -*- 2 3// Copyright (C) 2010-2018 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/forward_list 26 * This file is a GNU debug extension to the Standard C++ Library. 27 */ 28 29#ifndef _GLIBCXX_DEBUG_FORWARD_LIST 30#define _GLIBCXX_DEBUG_FORWARD_LIST 1 31 32#pragma GCC system_header 33 34#include <forward_list> 35#include <debug/safe_sequence.h> 36#include <debug/safe_container.h> 37#include <debug/safe_iterator.h> 38 39// Special validity check for forward_list ranges. 40#define __glibcxx_check_valid_fl_range(_First,_Last,_Dist) \ 41_GLIBCXX_DEBUG_VERIFY(_First._M_valid_range(_Last, _Dist, false), \ 42 _M_message(__gnu_debug::__msg_valid_range) \ 43 ._M_iterator(_First, #_First) \ 44 ._M_iterator(_Last, #_Last)) 45 46namespace __gnu_debug 47{ 48 /// Special iterators swap and invalidation for forward_list because of the 49 /// before_begin iterator. 50 template<typename _SafeSequence> 51 class _Safe_forward_list 52 : public _Safe_sequence<_SafeSequence> 53 { 54 _SafeSequence& 55 _M_this() noexcept 56 { return *static_cast<_SafeSequence*>(this); } 57 58 static void 59 _M_swap_aux(_Safe_sequence_base& __lhs, 60 _Safe_iterator_base*& __lhs_iterators, 61 _Safe_sequence_base& __rhs, 62 _Safe_iterator_base*& __rhs_iterators); 63 64 void _M_swap_single(_Safe_sequence_base&) noexcept; 65 66 protected: 67 void 68 _M_invalidate_all() 69 { 70 using _Base_const_iterator = __decltype(_M_this()._M_base().cend()); 71 this->_M_invalidate_if([this](_Base_const_iterator __it) 72 { 73 return __it != _M_this()._M_base().cbefore_begin() 74 && __it != _M_this()._M_base().cend(); }); 75 } 76 77 void _M_swap(_Safe_sequence_base&) noexcept; 78 }; 79 80 template<typename _SafeSequence> 81 void 82 _Safe_forward_list<_SafeSequence>:: 83 _M_swap_aux(_Safe_sequence_base& __lhs, 84 _Safe_iterator_base*& __lhs_iterators, 85 _Safe_sequence_base& __rhs, 86 _Safe_iterator_base*& __rhs_iterators) 87 { 88 using const_iterator = typename _SafeSequence::const_iterator; 89 _Safe_iterator_base* __bbegin_its = 0; 90 _Safe_iterator_base* __last_bbegin = 0; 91 _SafeSequence& __rseq = static_cast<_SafeSequence&>(__rhs); 92 93 for (_Safe_iterator_base* __iter = __lhs_iterators; __iter;) 94 { 95 // Even iterator is cast to const_iterator, not a problem. 96 _Safe_iterator_base* __victim_base = __iter; 97 const_iterator* __victim = 98 static_cast<const_iterator*>(__victim_base); 99 __iter = __iter->_M_next; 100 if (__victim->base() == __rseq._M_base().cbefore_begin()) 101 { 102 __victim->_M_unlink(); 103 if (__lhs_iterators == __victim_base) 104 __lhs_iterators = __victim_base->_M_next; 105 if (__bbegin_its) 106 { 107 __victim_base->_M_next = __bbegin_its; 108 __bbegin_its->_M_prior = __victim_base; 109 } 110 else 111 __last_bbegin = __victim_base; 112 __bbegin_its = __victim_base; 113 } 114 else 115 __victim_base->_M_sequence = std::__addressof(__lhs); 116 } 117 118 if (__bbegin_its) 119 { 120 if (__rhs_iterators) 121 { 122 __rhs_iterators->_M_prior = __last_bbegin; 123 __last_bbegin->_M_next = __rhs_iterators; 124 } 125 __rhs_iterators = __bbegin_its; 126 } 127 } 128 129 template<typename _SafeSequence> 130 void 131 _Safe_forward_list<_SafeSequence>:: 132 _M_swap_single(_Safe_sequence_base& __other) noexcept 133 { 134 std::swap(_M_this()._M_iterators, __other._M_iterators); 135 std::swap(_M_this()._M_const_iterators, __other._M_const_iterators); 136 // Useless, always 1 on forward_list 137 //std::swap(_M_this()_M_version, __other._M_version); 138 _Safe_iterator_base* __this_its = _M_this()._M_iterators; 139 _M_swap_aux(__other, __other._M_iterators, 140 _M_this(), _M_this()._M_iterators); 141 _Safe_iterator_base* __this_const_its = _M_this()._M_const_iterators; 142 _M_swap_aux(__other, __other._M_const_iterators, 143 _M_this(), _M_this()._M_const_iterators); 144 _M_swap_aux(_M_this(), __this_its, 145 __other, __other._M_iterators); 146 _M_swap_aux(_M_this(), __this_const_its, 147 __other, __other._M_const_iterators); 148 } 149 150 /* Special forward_list _M_swap version that does not swap the 151 * before-begin ownership.*/ 152 template<typename _SafeSequence> 153 void 154 _Safe_forward_list<_SafeSequence>:: 155 _M_swap(_Safe_sequence_base& __other) noexcept 156 { 157 // We need to lock both sequences to swap 158 using namespace __gnu_cxx; 159 __mutex *__this_mutex = &_M_this()._M_get_mutex(); 160 __mutex *__other_mutex = 161 &static_cast<_SafeSequence&>(__other)._M_get_mutex(); 162 if (__this_mutex == __other_mutex) 163 { 164 __scoped_lock __lock(*__this_mutex); 165 _M_swap_single(__other); 166 } 167 else 168 { 169 __scoped_lock __l1(__this_mutex < __other_mutex 170 ? *__this_mutex : *__other_mutex); 171 __scoped_lock __l2(__this_mutex < __other_mutex 172 ? *__other_mutex : *__this_mutex); 173 _M_swap_single(__other); 174 } 175 } 176} 177 178namespace std _GLIBCXX_VISIBILITY(default) 179{ 180namespace __debug 181{ 182 /// Class std::forward_list with safety/checking/debug instrumentation. 183 template<typename _Tp, typename _Alloc = std::allocator<_Tp> > 184 class forward_list 185 : public __gnu_debug::_Safe_container< 186 forward_list<_Tp, _Alloc>, _Alloc, __gnu_debug::_Safe_forward_list>, 187 public _GLIBCXX_STD_C::forward_list<_Tp, _Alloc> 188 { 189 typedef _GLIBCXX_STD_C::forward_list<_Tp, _Alloc> _Base; 190 typedef __gnu_debug::_Safe_container< 191 forward_list, _Alloc, __gnu_debug::_Safe_forward_list> _Safe; 192 193 typedef typename _Base::iterator _Base_iterator; 194 typedef typename _Base::const_iterator _Base_const_iterator; 195 196 public: 197 typedef typename _Base::reference reference; 198 typedef typename _Base::const_reference const_reference; 199 200 typedef __gnu_debug::_Safe_iterator< 201 _Base_iterator, forward_list> iterator; 202 typedef __gnu_debug::_Safe_iterator< 203 _Base_const_iterator, forward_list> const_iterator; 204 205 typedef typename _Base::size_type size_type; 206 typedef typename _Base::difference_type difference_type; 207 208 typedef _Tp value_type; 209 typedef typename _Base::allocator_type allocator_type; 210 typedef typename _Base::pointer pointer; 211 typedef typename _Base::const_pointer const_pointer; 212 213 // 23.2.3.1 construct/copy/destroy: 214 215 forward_list() = default; 216 217 explicit 218 forward_list(const allocator_type& __al) noexcept 219 : _Base(__al) { } 220 221 forward_list(const forward_list& __list, const allocator_type& __al) 222 : _Base(__list, __al) 223 { } 224 225 forward_list(forward_list&& __list, const allocator_type& __al) 226 : _Safe(std::move(__list._M_safe()), __al), 227 _Base(std::move(__list._M_base()), __al) 228 { } 229 230 explicit 231 forward_list(size_type __n, const allocator_type& __al = allocator_type()) 232 : _Base(__n, __al) 233 { } 234 235 forward_list(size_type __n, const _Tp& __value, 236 const allocator_type& __al = allocator_type()) 237 : _Base(__n, __value, __al) 238 { } 239 240 template<typename _InputIterator, 241 typename = std::_RequireInputIter<_InputIterator>> 242 forward_list(_InputIterator __first, _InputIterator __last, 243 const allocator_type& __al = allocator_type()) 244 : _Base(__gnu_debug::__base(__gnu_debug::__check_valid_range(__first, 245 __last)), 246 __gnu_debug::__base(__last), __al) 247 { } 248 249 forward_list(const forward_list&) = default; 250 251 forward_list(forward_list&&) = default; 252 253 forward_list(std::initializer_list<_Tp> __il, 254 const allocator_type& __al = allocator_type()) 255 : _Base(__il, __al) 256 { } 257 258 ~forward_list() = default; 259 260 forward_list& 261 operator=(const forward_list&) = default; 262 263 forward_list& 264 operator=(forward_list&&) = default; 265 266 forward_list& 267 operator=(std::initializer_list<_Tp> __il) 268 { 269 _M_base() = __il; 270 this->_M_invalidate_all(); 271 return *this; 272 } 273 274 template<typename _InputIterator, 275 typename = std::_RequireInputIter<_InputIterator>> 276 void 277 assign(_InputIterator __first, _InputIterator __last) 278 { 279 typename __gnu_debug::_Distance_traits<_InputIterator>::__type __dist; 280 __glibcxx_check_valid_range2(__first, __last, __dist); 281 282 if (__dist.second >= __gnu_debug::__dp_sign) 283 _Base::assign(__gnu_debug::__unsafe(__first), 284 __gnu_debug::__unsafe(__last)); 285 else 286 _Base::assign(__first, __last); 287 288 this->_M_invalidate_all(); 289 } 290 291 void 292 assign(size_type __n, const _Tp& __val) 293 { 294 _Base::assign(__n, __val); 295 this->_M_invalidate_all(); 296 } 297 298 void 299 assign(std::initializer_list<_Tp> __il) 300 { 301 _Base::assign(__il); 302 this->_M_invalidate_all(); 303 } 304 305 using _Base::get_allocator; 306 307 // iterators: 308 309 iterator 310 before_begin() noexcept 311 { return iterator(_Base::before_begin(), this); } 312 313 const_iterator 314 before_begin() const noexcept 315 { return const_iterator(_Base::before_begin(), this); } 316 317 iterator 318 begin() noexcept 319 { return iterator(_Base::begin(), this); } 320 321 const_iterator 322 begin() const noexcept 323 { return const_iterator(_Base::begin(), this); } 324 325 iterator 326 end() noexcept 327 { return iterator(_Base::end(), this); } 328 329 const_iterator 330 end() const noexcept 331 { return const_iterator(_Base::end(), this); } 332 333 const_iterator 334 cbegin() const noexcept 335 { return const_iterator(_Base::cbegin(), this); } 336 337 const_iterator 338 cbefore_begin() const noexcept 339 { return const_iterator(_Base::cbefore_begin(), this); } 340 341 const_iterator 342 cend() const noexcept 343 { return const_iterator(_Base::cend(), this); } 344 345 using _Base::empty; 346 using _Base::max_size; 347 348 // element access: 349 350 reference 351 front() 352 { 353 __glibcxx_check_nonempty(); 354 return _Base::front(); 355 } 356 357 const_reference 358 front() const 359 { 360 __glibcxx_check_nonempty(); 361 return _Base::front(); 362 } 363 364 // modifiers: 365 366 using _Base::emplace_front; 367 using _Base::push_front; 368 369 void 370 pop_front() 371 { 372 __glibcxx_check_nonempty(); 373 this->_M_invalidate_if([this](_Base_const_iterator __it) 374 { return __it == this->_M_base().cbegin(); }); 375 _Base::pop_front(); 376 } 377 378 template<typename... _Args> 379 iterator 380 emplace_after(const_iterator __pos, _Args&&... __args) 381 { 382 __glibcxx_check_insert_after(__pos); 383 return iterator(_Base::emplace_after(__pos.base(), 384 std::forward<_Args>(__args)...), 385 this); 386 } 387 388 iterator 389 insert_after(const_iterator __pos, const _Tp& __val) 390 { 391 __glibcxx_check_insert_after(__pos); 392 return iterator(_Base::insert_after(__pos.base(), __val), this); 393 } 394 395 iterator 396 insert_after(const_iterator __pos, _Tp&& __val) 397 { 398 __glibcxx_check_insert_after(__pos); 399 return iterator(_Base::insert_after(__pos.base(), std::move(__val)), 400 this); 401 } 402 403 iterator 404 insert_after(const_iterator __pos, size_type __n, const _Tp& __val) 405 { 406 __glibcxx_check_insert_after(__pos); 407 return iterator(_Base::insert_after(__pos.base(), __n, __val), 408 this); 409 } 410 411 template<typename _InputIterator, 412 typename = std::_RequireInputIter<_InputIterator>> 413 iterator 414 insert_after(const_iterator __pos, 415 _InputIterator __first, _InputIterator __last) 416 { 417 typename __gnu_debug::_Distance_traits<_InputIterator>::__type __dist; 418 __glibcxx_check_insert_range_after(__pos, __first, __last, __dist); 419 420 if (__dist.second >= __gnu_debug::__dp_sign) 421 return 422 { 423 _Base::insert_after(__pos.base(), 424 __gnu_debug::__unsafe(__first), 425 __gnu_debug::__unsafe(__last)), 426 this 427 }; 428 else 429 return { _Base::insert_after(__pos.base(), __first, __last), this }; 430 } 431 432 iterator 433 insert_after(const_iterator __pos, std::initializer_list<_Tp> __il) 434 { 435 __glibcxx_check_insert_after(__pos); 436 return iterator(_Base::insert_after(__pos.base(), __il), this); 437 } 438 439 private: 440 _Base_iterator 441 _M_erase_after(_Base_const_iterator __pos) 442 { 443 _Base_const_iterator __next = std::next(__pos); 444 this->_M_invalidate_if([__next](_Base_const_iterator __it) 445 { return __it == __next; }); 446 return _Base::erase_after(__pos); 447 } 448 public: 449 iterator 450 erase_after(const_iterator __pos) 451 { 452 __glibcxx_check_erase_after(__pos); 453 return iterator(_M_erase_after(__pos.base()), this); 454 } 455 456 iterator 457 erase_after(const_iterator __pos, const_iterator __last) 458 { 459 __glibcxx_check_erase_range_after(__pos, __last); 460 for (_Base_const_iterator __victim = std::next(__pos.base()); 461 __victim != __last.base(); ++__victim) 462 { 463 _GLIBCXX_DEBUG_VERIFY(__victim != _Base::end(), 464 _M_message(__gnu_debug::__msg_valid_range2) 465 ._M_sequence(*this, "this") 466 ._M_iterator(__pos, "pos") 467 ._M_iterator(__last, "last")); 468 this->_M_invalidate_if([__victim](_Base_const_iterator __it) 469 { return __it == __victim; }); 470 } 471 return iterator(_Base::erase_after(__pos.base(), __last.base()), this); 472 } 473 474 void 475 swap(forward_list& __list) 476 noexcept( noexcept(declval<_Base&>().swap(__list)) ) 477 { 478 _Safe::_M_swap(__list); 479 _Base::swap(__list); 480 } 481 482 void 483 resize(size_type __sz) 484 { 485 this->_M_detach_singular(); 486 487 // if __sz < size(), invalidate all iterators in [begin+__sz, end() 488 _Base_iterator __victim = _Base::begin(); 489 _Base_iterator __end = _Base::end(); 490 for (size_type __i = __sz; __victim != __end && __i > 0; --__i) 491 ++__victim; 492 493 for (; __victim != __end; ++__victim) 494 { 495 this->_M_invalidate_if([__victim](_Base_const_iterator __it) 496 { return __it == __victim; }); 497 } 498 499 __try 500 { 501 _Base::resize(__sz); 502 } 503 __catch(...) 504 { 505 this->_M_revalidate_singular(); 506 __throw_exception_again; 507 } 508 } 509 510 void 511 resize(size_type __sz, const value_type& __val) 512 { 513 this->_M_detach_singular(); 514 515 // if __sz < size(), invalidate all iterators in [begin+__sz, end()) 516 _Base_iterator __victim = _Base::begin(); 517 _Base_iterator __end = _Base::end(); 518 for (size_type __i = __sz; __victim != __end && __i > 0; --__i) 519 ++__victim; 520 521 for (; __victim != __end; ++__victim) 522 { 523 this->_M_invalidate_if([__victim](_Base_const_iterator __it) 524 { return __it == __victim; }); 525 } 526 527 __try 528 { 529 _Base::resize(__sz, __val); 530 } 531 __catch(...) 532 { 533 this->_M_revalidate_singular(); 534 __throw_exception_again; 535 } 536 } 537 538 void 539 clear() noexcept 540 { 541 _Base::clear(); 542 this->_M_invalidate_all(); 543 } 544 545 // 23.2.3.5 forward_list operations: 546 void 547 splice_after(const_iterator __pos, forward_list&& __list) 548 { 549 __glibcxx_check_insert_after(__pos); 550 _GLIBCXX_DEBUG_VERIFY(std::__addressof(__list) != this, 551 _M_message(__gnu_debug::__msg_self_splice) 552 ._M_sequence(*this, "this")); 553 _GLIBCXX_DEBUG_VERIFY(__list.get_allocator() == this->get_allocator(), 554 _M_message(__gnu_debug::__msg_splice_alloc) 555 ._M_sequence(*this) 556 ._M_sequence(__list, "__list")); 557 this->_M_transfer_from_if(__list, [&__list](_Base_const_iterator __it) 558 { 559 return __it != __list._M_base().cbefore_begin() 560 && __it != __list._M_base().end(); 561 }); 562 _Base::splice_after(__pos.base(), std::move(__list._M_base())); 563 } 564 565 void 566 splice_after(const_iterator __pos, forward_list& __list) 567 { splice_after(__pos, std::move(__list)); } 568 569 void 570 splice_after(const_iterator __pos, forward_list&& __list, 571 const_iterator __i) 572 { 573 __glibcxx_check_insert_after(__pos); 574 _GLIBCXX_DEBUG_VERIFY(__i._M_before_dereferenceable(), 575 _M_message(__gnu_debug::__msg_splice_bad) 576 ._M_iterator(__i, "__i")); 577 _GLIBCXX_DEBUG_VERIFY(__i._M_attached_to(std::__addressof(__list)), 578 _M_message(__gnu_debug::__msg_splice_other) 579 ._M_iterator(__i, "__i") 580 ._M_sequence(__list, "__list")); 581 _GLIBCXX_DEBUG_VERIFY(__list.get_allocator() == this->get_allocator(), 582 _M_message(__gnu_debug::__msg_splice_alloc) 583 ._M_sequence(*this) 584 ._M_sequence(__list, "__list")); 585 586 // _GLIBCXX_RESOLVE_LIB_DEFECTS 587 // 250. splicing invalidates iterators 588 _Base_const_iterator __next = std::next(__i.base()); 589 this->_M_transfer_from_if(__list, [__next](_Base_const_iterator __it) 590 { return __it == __next; }); 591 _Base::splice_after(__pos.base(), std::move(__list._M_base()), 592 __i.base()); 593 } 594 595 void 596 splice_after(const_iterator __pos, forward_list& __list, 597 const_iterator __i) 598 { splice_after(__pos, std::move(__list), __i); } 599 600 void 601 splice_after(const_iterator __pos, forward_list&& __list, 602 const_iterator __before, const_iterator __last) 603 { 604 typename __gnu_debug::_Distance_traits<const_iterator>::__type __dist; 605 auto __listptr = std::__addressof(__list); 606 __glibcxx_check_insert_after(__pos); 607 __glibcxx_check_valid_fl_range(__before, __last, __dist); 608 _GLIBCXX_DEBUG_VERIFY(__before._M_attached_to(__listptr), 609 _M_message(__gnu_debug::__msg_splice_other) 610 ._M_sequence(__list, "list") 611 ._M_iterator(__before, "before")); 612 _GLIBCXX_DEBUG_VERIFY(__before._M_dereferenceable() 613 || __before._M_is_before_begin(), 614 _M_message(__gnu_debug::__msg_valid_range2) 615 ._M_sequence(__list, "list") 616 ._M_iterator(__before, "before") 617 ._M_iterator(__last, "last")); 618 _GLIBCXX_DEBUG_VERIFY(__before != __last, 619 _M_message(__gnu_debug::__msg_valid_range2) 620 ._M_sequence(__list, "list") 621 ._M_iterator(__before, "before") 622 ._M_iterator(__last, "last")); 623 _GLIBCXX_DEBUG_VERIFY(__list.get_allocator() == this->get_allocator(), 624 _M_message(__gnu_debug::__msg_splice_alloc) 625 ._M_sequence(*this) 626 ._M_sequence(__list, "__list")); 627 628 for (_Base_const_iterator __tmp = std::next(__before.base()); 629 __tmp != __last.base(); ++__tmp) 630 { 631 _GLIBCXX_DEBUG_VERIFY(__tmp != __list._M_base().end(), 632 _M_message(__gnu_debug::__msg_valid_range2) 633 ._M_sequence(__list, "list") 634 ._M_iterator(__before, "before") 635 ._M_iterator(__last, "last")); 636 _GLIBCXX_DEBUG_VERIFY(__listptr != this || __tmp != __pos.base(), 637 _M_message(__gnu_debug::__msg_splice_overlap) 638 ._M_iterator(__tmp, "position") 639 ._M_iterator(__before, "before") 640 ._M_iterator(__last, "last")); 641 // _GLIBCXX_RESOLVE_LIB_DEFECTS 642 // 250. splicing invalidates iterators 643 this->_M_transfer_from_if(__list, [__tmp](_Base_const_iterator __it) 644 { return __it == __tmp; }); 645 } 646 647 _Base::splice_after(__pos.base(), std::move(__list._M_base()), 648 __before.base(), __last.base()); 649 } 650 651 void 652 splice_after(const_iterator __pos, forward_list& __list, 653 const_iterator __before, const_iterator __last) 654 { splice_after(__pos, std::move(__list), __before, __last); } 655 656 void 657 remove(const _Tp& __val) 658 { 659 _Base_iterator __x = _Base::before_begin(); 660 _Base_iterator __old = __x++; 661 while (__x != _Base::end()) 662 { 663 if (*__x == __val) 664 __x = _M_erase_after(__old); 665 else 666 __old = __x++; 667 } 668 } 669 670 template<typename _Pred> 671 void 672 remove_if(_Pred __pred) 673 { 674 _Base_iterator __x = _Base::before_begin(); 675 _Base_iterator __old = __x++; 676 while (__x != _Base::end()) 677 { 678 if (__pred(*__x)) 679 __x = _M_erase_after(__old); 680 else 681 __old = __x++; 682 } 683 } 684 685 void 686 unique() 687 { 688 _Base_iterator __first = _Base::begin(); 689 _Base_iterator __last = _Base::end(); 690 if (__first == __last) 691 return; 692 _Base_iterator __next = std::next(__first); 693 while (__next != __last) 694 { 695 if (*__first == *__next) 696 __next = _M_erase_after(__first); 697 else 698 __first = __next++; 699 } 700 } 701 702 template<typename _BinPred> 703 void 704 unique(_BinPred __binary_pred) 705 { 706 _Base_iterator __first = _Base::begin(); 707 _Base_iterator __last = _Base::end(); 708 if (__first == __last) 709 return; 710 _Base_iterator __next = std::next(__first); 711 while (__next != __last) 712 { 713 if (__binary_pred(*__first, *__next)) 714 __next = _M_erase_after(__first); 715 else 716 __first = __next++; 717 } 718 } 719 720 void 721 merge(forward_list&& __list) 722 { 723 if (this != std::__addressof(__list)) 724 { 725 __glibcxx_check_sorted(_Base::begin(), _Base::end()); 726 __glibcxx_check_sorted(__list._M_base().begin(), 727 __list._M_base().end()); 728 this->_M_transfer_from_if(__list, [&__list](_Base_const_iterator __it) 729 { 730 return __it != __list._M_base().cbefore_begin() 731 && __it != __list._M_base().cend(); 732 }); 733 _Base::merge(std::move(__list._M_base())); 734 } 735 } 736 737 void 738 merge(forward_list& __list) 739 { merge(std::move(__list)); } 740 741 template<typename _Comp> 742 void 743 merge(forward_list&& __list, _Comp __comp) 744 { 745 if (this != std::__addressof(__list)) 746 { 747 __glibcxx_check_sorted_pred(_Base::begin(), _Base::end(), __comp); 748 __glibcxx_check_sorted_pred(__list._M_base().begin(), 749 __list._M_base().end(), __comp); 750 this->_M_transfer_from_if(__list, 751 [&__list](_Base_const_iterator __it) 752 { 753 return __it != __list._M_base().cbefore_begin() 754 && __it != __list._M_base().cend(); 755 }); 756 _Base::merge(std::move(__list._M_base()), __comp); 757 } 758 } 759 760 template<typename _Comp> 761 void 762 merge(forward_list& __list, _Comp __comp) 763 { merge(std::move(__list), __comp); } 764 765 using _Base::sort; 766 using _Base::reverse; 767 768 _Base& 769 _M_base() noexcept { return *this; } 770 771 const _Base& 772 _M_base() const noexcept { return *this; } 773 }; 774 775#if __cpp_deduction_guides >= 201606 776 template<typename _InputIterator, typename _ValT 777 = typename iterator_traits<_InputIterator>::value_type, 778 typename _Allocator = allocator<_ValT>, 779 typename = _RequireInputIter<_InputIterator>, 780 typename = _RequireAllocator<_Allocator>> 781 forward_list(_InputIterator, _InputIterator, _Allocator = _Allocator()) 782 -> forward_list<_ValT, _Allocator>; 783#endif 784 785 template<typename _Tp, typename _Alloc> 786 bool 787 operator==(const forward_list<_Tp, _Alloc>& __lx, 788 const forward_list<_Tp, _Alloc>& __ly) 789 { return __lx._M_base() == __ly._M_base(); } 790 791 template<typename _Tp, typename _Alloc> 792 inline bool 793 operator<(const forward_list<_Tp, _Alloc>& __lx, 794 const forward_list<_Tp, _Alloc>& __ly) 795 { return __lx._M_base() < __ly._M_base(); } 796 797 template<typename _Tp, typename _Alloc> 798 inline bool 799 operator!=(const forward_list<_Tp, _Alloc>& __lx, 800 const forward_list<_Tp, _Alloc>& __ly) 801 { return !(__lx == __ly); } 802 803 /// Based on operator< 804 template<typename _Tp, typename _Alloc> 805 inline bool 806 operator>(const forward_list<_Tp, _Alloc>& __lx, 807 const forward_list<_Tp, _Alloc>& __ly) 808 { return (__ly < __lx); } 809 810 /// Based on operator< 811 template<typename _Tp, typename _Alloc> 812 inline bool 813 operator>=(const forward_list<_Tp, _Alloc>& __lx, 814 const forward_list<_Tp, _Alloc>& __ly) 815 { return !(__lx < __ly); } 816 817 /// Based on operator< 818 template<typename _Tp, typename _Alloc> 819 inline bool 820 operator<=(const forward_list<_Tp, _Alloc>& __lx, 821 const forward_list<_Tp, _Alloc>& __ly) 822 { return !(__ly < __lx); } 823 824 /// See std::forward_list::swap(). 825 template<typename _Tp, typename _Alloc> 826 inline void 827 swap(forward_list<_Tp, _Alloc>& __lx, forward_list<_Tp, _Alloc>& __ly) 828 noexcept(noexcept(__lx.swap(__ly))) 829 { __lx.swap(__ly); } 830 831} // namespace __debug 832} // namespace std 833 834namespace __gnu_debug 835{ 836 template<typename _Tp, typename _Alloc> 837 struct _BeforeBeginHelper<std::__debug::forward_list<_Tp, _Alloc> > 838 { 839 typedef std::__debug::forward_list<_Tp, _Alloc> _Sequence; 840 841 template<typename _Iterator> 842 static bool 843 _S_Is(const _Safe_iterator<_Iterator, _Sequence>& __it) 844 { 845 return 846 __it.base() == __it._M_get_sequence()->_M_base().before_begin(); 847 } 848 849 template<typename _Iterator> 850 static bool 851 _S_Is_Beginnest(const _Safe_iterator<_Iterator, _Sequence>& __it) 852 { return _S_Is(__it); } 853 }; 854 855 template<typename _Tp, typename _Alloc> 856 struct _Sequence_traits<std::__debug::forward_list<_Tp, _Alloc> > 857 { 858 typedef typename std::__debug::forward_list<_Tp, _Alloc>::iterator _It; 859 860 static typename _Distance_traits<_It>::__type 861 _S_size(const std::__debug::forward_list<_Tp, _Alloc>& __seq) 862 { 863 return __seq.empty() 864 ? std::make_pair(0, __dp_exact) : std::make_pair(1, __dp_equality); 865 } 866 }; 867 868#ifndef _GLIBCXX_DEBUG_PEDANTIC 869 template<class _Tp, class _Alloc> 870 struct _Insert_range_from_self_is_safe< 871 std::__debug::forward_list<_Tp, _Alloc> > 872 { enum { __value = 1 }; }; 873#endif 874} 875 876#endif 877