1 // <forward_list> -*- C++ -*- 2 3 // Copyright (C) 2010-2013 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_iterator.h> 37 38 namespace std _GLIBCXX_VISIBILITY(default) 39 { 40 namespace __debug 41 { 42 /// Class std::forward_list with safety/checking/debug instrumentation. 43 template<typename _Tp, typename _Alloc = std::allocator<_Tp> > 44 class forward_list 45 : public _GLIBCXX_STD_C::forward_list<_Tp, _Alloc>, 46 public __gnu_debug::_Safe_sequence<forward_list<_Tp, _Alloc> > 47 { 48 typedef _GLIBCXX_STD_C::forward_list<_Tp, _Alloc> _Base; 49 50 typedef typename _Base::iterator _Base_iterator; 51 typedef typename _Base::const_iterator _Base_const_iterator; 52 53 typedef typename __gnu_cxx::__alloc_traits<_Alloc>::template 54 rebind<_GLIBCXX_STD_C::_Fwd_list_node<_Tp>>::other _Node_alloc_type; 55 56 typedef __gnu_cxx::__alloc_traits<_Node_alloc_type> _Node_alloc_traits; 57 58 public: 59 typedef typename _Base::reference reference; 60 typedef typename _Base::const_reference const_reference; 61 62 typedef __gnu_debug::_Safe_iterator<_Base_iterator, 63 forward_list> iterator; 64 typedef __gnu_debug::_Safe_iterator<_Base_const_iterator, 65 forward_list> const_iterator; 66 67 typedef typename _Base::size_type size_type; 68 typedef typename _Base::difference_type difference_type; 69 70 typedef _Tp value_type; 71 typedef _Alloc allocator_type; 72 typedef typename _Base::pointer pointer; 73 typedef typename _Base::const_pointer const_pointer; 74 75 // 23.2.3.1 construct/copy/destroy: 76 explicit 77 forward_list(const _Alloc& __al = _Alloc()) 78 : _Base(__al) { } 79 80 forward_list(const forward_list& __list, const _Alloc& __al) 81 : _Base(__list, __al) 82 { } 83 84 forward_list(forward_list&& __list, const _Alloc& __al) 85 : _Base(std::move(__list._M_base()), __al) 86 { 87 if (__list.get_allocator() == __al) 88 this->_M_swap(__list); 89 else 90 __list._M_invalidate_all(); 91 } 92 93 explicit 94 forward_list(size_type __n, const _Alloc& __al = _Alloc()) 95 : _Base(__n, __al) 96 { } 97 98 forward_list(size_type __n, const _Tp& __value, 99 const _Alloc& __al = _Alloc()) 100 : _Base(__n, __value, __al) 101 { } 102 103 template<typename _InputIterator, 104 typename = std::_RequireInputIter<_InputIterator>> 105 forward_list(_InputIterator __first, _InputIterator __last, 106 const _Alloc& __al = _Alloc()) 107 : _Base(__gnu_debug::__base(__gnu_debug::__check_valid_range(__first, 108 __last)), 109 __gnu_debug::__base(__last), __al) 110 { } 111 112 forward_list(const forward_list& __list) 113 : _Base(__list) 114 { } 115 116 forward_list(forward_list&& __list) noexcept 117 : _Base(std::move(__list._M_base())) 118 { 119 this->_M_swap(__list); 120 } 121 122 forward_list(std::initializer_list<_Tp> __il, 123 const _Alloc& __al = _Alloc()) 124 : _Base(__il, __al) 125 { } 126 127 ~forward_list() noexcept 128 { } 129 130 forward_list& 131 operator=(const forward_list& __list) 132 { 133 static_cast<_Base&>(*this) = __list; 134 this->_M_invalidate_all(); 135 return *this; 136 } 137 138 forward_list& 139 operator=(forward_list&& __list) 140 noexcept(_Node_alloc_traits::_S_nothrow_move()) 141 { 142 __glibcxx_check_self_move_assign(__list); 143 bool xfer_memory = _Node_alloc_traits::_S_propagate_on_move_assign() 144 || __list.get_allocator() == this->get_allocator(); 145 static_cast<_Base&>(*this) = std::move(__list); 146 if (xfer_memory) 147 this->_M_swap(__list); 148 else 149 this->_M_invalidate_all(); 150 __list._M_invalidate_all(); 151 return *this; 152 } 153 154 forward_list& 155 operator=(std::initializer_list<_Tp> __il) 156 { 157 static_cast<_Base&>(*this) = __il; 158 this->_M_invalidate_all(); 159 return *this; 160 } 161 162 template<typename _InputIterator, 163 typename = std::_RequireInputIter<_InputIterator>> 164 void 165 assign(_InputIterator __first, _InputIterator __last) 166 { 167 __glibcxx_check_valid_range(__first, __last); 168 _Base::assign(__gnu_debug::__base(__first), 169 __gnu_debug::__base(__last)); 170 this->_M_invalidate_all(); 171 } 172 173 void 174 assign(size_type __n, const _Tp& __val) 175 { 176 _Base::assign(__n, __val); 177 this->_M_invalidate_all(); 178 } 179 180 void 181 assign(std::initializer_list<_Tp> __il) 182 { 183 _Base::assign(__il); 184 this->_M_invalidate_all(); 185 } 186 187 using _Base::get_allocator; 188 189 // iterators: 190 191 iterator 192 before_begin() noexcept 193 { return iterator(_Base::before_begin(), this); } 194 195 const_iterator 196 before_begin() const noexcept 197 { return const_iterator(_Base::before_begin(), this); } 198 199 iterator 200 begin() noexcept 201 { return iterator(_Base::begin(), this); } 202 203 const_iterator 204 begin() const noexcept 205 { return const_iterator(_Base::begin(), this); } 206 207 iterator 208 end() noexcept 209 { return iterator(_Base::end(), this); } 210 211 const_iterator 212 end() const noexcept 213 { return const_iterator(_Base::end(), this); } 214 215 const_iterator 216 cbegin() const noexcept 217 { return const_iterator(_Base::cbegin(), this); } 218 219 const_iterator 220 cbefore_begin() const noexcept 221 { return const_iterator(_Base::cbefore_begin(), this); } 222 223 const_iterator 224 cend() const noexcept 225 { return const_iterator(_Base::cend(), this); } 226 227 using _Base::empty; 228 using _Base::max_size; 229 230 // element access: 231 232 reference 233 front() 234 { 235 __glibcxx_check_nonempty(); 236 return _Base::front(); 237 } 238 239 const_reference 240 front() const 241 { 242 __glibcxx_check_nonempty(); 243 return _Base::front(); 244 } 245 246 // modiers: 247 248 using _Base::emplace_front; 249 using _Base::push_front; 250 251 void 252 pop_front() 253 { 254 __glibcxx_check_nonempty(); 255 this->_M_invalidate_if([this](_Base_const_iterator __it) 256 { return __it == this->_M_base().cbegin(); }); 257 _Base::pop_front(); 258 } 259 260 template<typename... _Args> 261 iterator 262 emplace_after(const_iterator __pos, _Args&&... __args) 263 { 264 __glibcxx_check_insert_after(__pos); 265 return iterator(_Base::emplace_after(__pos.base(), 266 std::forward<_Args>(__args)...), 267 this); 268 } 269 270 iterator 271 insert_after(const_iterator __pos, const _Tp& __val) 272 { 273 __glibcxx_check_insert_after(__pos); 274 return iterator(_Base::insert_after(__pos.base(), __val), this); 275 } 276 277 iterator 278 insert_after(const_iterator __pos, _Tp&& __val) 279 { 280 __glibcxx_check_insert_after(__pos); 281 return iterator(_Base::insert_after(__pos.base(), std::move(__val)), 282 this); 283 } 284 285 iterator 286 insert_after(const_iterator __pos, size_type __n, const _Tp& __val) 287 { 288 __glibcxx_check_insert_after(__pos); 289 return iterator(_Base::insert_after(__pos.base(), __n, __val), 290 this); 291 } 292 293 template<typename _InputIterator, 294 typename = std::_RequireInputIter<_InputIterator>> 295 iterator 296 insert_after(const_iterator __pos, 297 _InputIterator __first, _InputIterator __last) 298 { 299 __glibcxx_check_insert_range_after(__pos, __first, __last); 300 return iterator(_Base::insert_after(__pos.base(), 301 __gnu_debug::__base(__first), 302 __gnu_debug::__base(__last)), 303 this); 304 } 305 306 iterator 307 insert_after(const_iterator __pos, std::initializer_list<_Tp> __il) 308 { 309 __glibcxx_check_insert_after(__pos); 310 return iterator(_Base::insert_after(__pos.base(), __il), this); 311 } 312 313 private: 314 _Base_iterator 315 _M_erase_after(_Base_const_iterator __pos) 316 { 317 _Base_const_iterator __next = std::next(__pos); 318 this->_M_invalidate_if([__next](_Base_const_iterator __it) 319 { return __it == __next; }); 320 return _Base::erase_after(__pos); 321 } 322 public: 323 iterator 324 erase_after(const_iterator __pos) 325 { 326 __glibcxx_check_erase_after(__pos); 327 return iterator(_M_erase_after(__pos.base()), this); 328 } 329 330 iterator 331 erase_after(const_iterator __pos, const_iterator __last) 332 { 333 __glibcxx_check_erase_range_after(__pos, __last); 334 for (_Base_const_iterator __victim = std::next(__pos.base()); 335 __victim != __last.base(); ++__victim) 336 { 337 _GLIBCXX_DEBUG_VERIFY(__victim != _Base::end(), 338 _M_message(__gnu_debug::__msg_valid_range2) 339 ._M_sequence(*this, "this") 340 ._M_iterator(__pos, "pos") 341 ._M_iterator(__last, "last")); 342 this->_M_invalidate_if([__victim](_Base_const_iterator __it) 343 { return __it == __victim; }); 344 } 345 return iterator(_Base::erase_after(__pos.base(), __last.base()), this); 346 } 347 348 void 349 swap(forward_list& __list) 350 noexcept(_Node_alloc_traits::_S_nothrow_swap()) 351 { 352 if (!_Node_alloc_traits::_S_propagate_on_swap()) 353 __glibcxx_check_equal_allocs(__list); 354 _Base::swap(__list); 355 this->_M_swap(__list); 356 } 357 358 void 359 resize(size_type __sz) 360 { 361 this->_M_detach_singular(); 362 363 // if __sz < size(), invalidate all iterators in [begin+__sz, end() 364 _Base_iterator __victim = _Base::begin(); 365 _Base_iterator __end = _Base::end(); 366 for (size_type __i = __sz; __victim != __end && __i > 0; --__i) 367 ++__victim; 368 369 for (; __victim != __end; ++__victim) 370 { 371 this->_M_invalidate_if([__victim](_Base_const_iterator __it) 372 { return __it == __victim; }); 373 } 374 375 __try 376 { 377 _Base::resize(__sz); 378 } 379 __catch(...) 380 { 381 this->_M_revalidate_singular(); 382 __throw_exception_again; 383 } 384 } 385 386 void 387 resize(size_type __sz, const value_type& __val) 388 { 389 this->_M_detach_singular(); 390 391 // if __sz < size(), invalidate all iterators in [begin+__sz, end()) 392 _Base_iterator __victim = _Base::begin(); 393 _Base_iterator __end = _Base::end(); 394 for (size_type __i = __sz; __victim != __end && __i > 0; --__i) 395 ++__victim; 396 397 for (; __victim != __end; ++__victim) 398 { 399 this->_M_invalidate_if([__victim](_Base_const_iterator __it) 400 { return __it == __victim; }); 401 } 402 403 __try 404 { 405 _Base::resize(__sz, __val); 406 } 407 __catch(...) 408 { 409 this->_M_revalidate_singular(); 410 __throw_exception_again; 411 } 412 } 413 414 void 415 clear() noexcept 416 { 417 _Base::clear(); 418 this->_M_invalidate_all(); 419 } 420 421 // 23.2.3.5 forward_list operations: 422 void 423 splice_after(const_iterator __pos, forward_list&& __list) 424 { 425 __glibcxx_check_insert_after(__pos); 426 _GLIBCXX_DEBUG_VERIFY(&__list != this, 427 _M_message(__gnu_debug::__msg_self_splice) 428 ._M_sequence(*this, "this")); 429 _GLIBCXX_DEBUG_VERIFY(__list.get_allocator() == this->get_allocator(), 430 _M_message(__gnu_debug::__msg_splice_alloc) 431 ._M_sequence(*this) 432 ._M_sequence(__list, "__list")); 433 this->_M_transfer_from_if(__list, [&__list](_Base_const_iterator __it) 434 { 435 return __it != __list._M_base().cbefore_begin() 436 && __it != __list._M_base().end(); 437 }); 438 _Base::splice_after(__pos.base(), std::move(__list._M_base())); 439 } 440 441 void 442 splice_after(const_iterator __pos, forward_list& __list) 443 { splice_after(__pos, std::move(__list)); } 444 445 void 446 splice_after(const_iterator __pos, forward_list&& __list, 447 const_iterator __i) 448 { 449 __glibcxx_check_insert_after(__pos); 450 _GLIBCXX_DEBUG_VERIFY(__i._M_before_dereferenceable(), 451 _M_message(__gnu_debug::__msg_splice_bad) 452 ._M_iterator(__i, "__i")); 453 _GLIBCXX_DEBUG_VERIFY(__i._M_attached_to(&__list), 454 _M_message(__gnu_debug::__msg_splice_other) 455 ._M_iterator(__i, "__i") 456 ._M_sequence(__list, "__list")); 457 _GLIBCXX_DEBUG_VERIFY(__list.get_allocator() == this->get_allocator(), 458 _M_message(__gnu_debug::__msg_splice_alloc) 459 ._M_sequence(*this) 460 ._M_sequence(__list, "__list")); 461 462 // _GLIBCXX_RESOLVE_LIB_DEFECTS 463 // 250. splicing invalidates iterators 464 _Base_const_iterator __next = std::next(__i.base()); 465 this->_M_transfer_from_if(__list, [__next](_Base_const_iterator __it) 466 { return __it == __next; }); 467 _Base::splice_after(__pos.base(), std::move(__list._M_base()), 468 __i.base()); 469 } 470 471 void 472 splice_after(const_iterator __pos, forward_list& __list, 473 const_iterator __i) 474 { splice_after(__pos, std::move(__list), __i); } 475 476 void 477 splice_after(const_iterator __pos, forward_list&& __list, 478 const_iterator __before, const_iterator __last) 479 { 480 __glibcxx_check_insert_after(__pos); 481 __glibcxx_check_valid_range(__before, __last); 482 _GLIBCXX_DEBUG_VERIFY(__before._M_attached_to(&__list), 483 _M_message(__gnu_debug::__msg_splice_other) 484 ._M_sequence(__list, "list") 485 ._M_iterator(__before, "before")); 486 _GLIBCXX_DEBUG_VERIFY(__before._M_dereferenceable() 487 || __before._M_is_before_begin(), 488 _M_message(__gnu_debug::__msg_valid_range2) 489 ._M_sequence(__list, "list") 490 ._M_iterator(__before, "before") 491 ._M_iterator(__last, "last")); 492 _GLIBCXX_DEBUG_VERIFY(__before != __last, 493 _M_message(__gnu_debug::__msg_valid_range2) 494 ._M_sequence(__list, "list") 495 ._M_iterator(__before, "before") 496 ._M_iterator(__last, "last")); 497 _GLIBCXX_DEBUG_VERIFY(__list.get_allocator() == this->get_allocator(), 498 _M_message(__gnu_debug::__msg_splice_alloc) 499 ._M_sequence(*this) 500 ._M_sequence(__list, "__list")); 501 502 for (_Base_const_iterator __tmp = std::next(__before.base()); 503 __tmp != __last.base(); ++__tmp) 504 { 505 _GLIBCXX_DEBUG_VERIFY(__tmp != __list._M_base().end(), 506 _M_message(__gnu_debug::__msg_valid_range2) 507 ._M_sequence(__list, "list") 508 ._M_iterator(__before, "before") 509 ._M_iterator(__last, "last")); 510 _GLIBCXX_DEBUG_VERIFY(&__list != this || __tmp != __pos.base(), 511 _M_message(__gnu_debug::__msg_splice_overlap) 512 ._M_iterator(__tmp, "position") 513 ._M_iterator(__before, "before") 514 ._M_iterator(__last, "last")); 515 // _GLIBCXX_RESOLVE_LIB_DEFECTS 516 // 250. splicing invalidates iterators 517 this->_M_transfer_from_if(__list, [__tmp](_Base_const_iterator __it) 518 { return __it == __tmp; }); 519 } 520 521 _Base::splice_after(__pos.base(), std::move(__list._M_base()), 522 __before.base(), __last.base()); 523 } 524 525 void 526 splice_after(const_iterator __pos, forward_list& __list, 527 const_iterator __before, const_iterator __last) 528 { splice_after(__pos, std::move(__list), __before, __last); } 529 530 void 531 remove(const _Tp& __val) 532 { 533 _Base_iterator __x = _Base::before_begin(); 534 _Base_iterator __old = __x++; 535 while (__x != _Base::end()) 536 { 537 if (*__x == __val) 538 __x = _M_erase_after(__old); 539 else 540 __old = __x++; 541 } 542 } 543 544 template<typename _Pred> 545 void 546 remove_if(_Pred __pred) 547 { 548 _Base_iterator __x = _Base::before_begin(); 549 _Base_iterator __old = __x++; 550 while (__x != _Base::end()) 551 { 552 if (__pred(*__x)) 553 __x = _M_erase_after(__old); 554 else 555 __old = __x++; 556 } 557 } 558 559 void 560 unique() 561 { 562 _Base_iterator __first = _Base::begin(); 563 _Base_iterator __last = _Base::end(); 564 if (__first == __last) 565 return; 566 _Base_iterator __next = std::next(__first); 567 while (__next != __last) 568 { 569 if (*__first == *__next) 570 __next = _M_erase_after(__first); 571 else 572 __first = __next++; 573 } 574 } 575 576 template<typename _BinPred> 577 void 578 unique(_BinPred __binary_pred) 579 { 580 _Base_iterator __first = _Base::begin(); 581 _Base_iterator __last = _Base::end(); 582 if (__first == __last) 583 return; 584 _Base_iterator __next = std::next(__first); 585 while (__next != __last) 586 { 587 if (__binary_pred(*__first, *__next)) 588 __next = _M_erase_after(__first); 589 else 590 __first = __next++; 591 } 592 } 593 594 void 595 merge(forward_list&& __list) 596 { 597 if (this != &__list) 598 { 599 __glibcxx_check_sorted(_Base::begin(), _Base::end()); 600 __glibcxx_check_sorted(__list._M_base().begin(), 601 __list._M_base().end()); 602 this->_M_transfer_from_if(__list, [&__list](_Base_const_iterator __it) 603 { 604 return __it != __list._M_base().cbefore_begin() 605 && __it != __list._M_base().cend(); 606 }); 607 _Base::merge(std::move(__list._M_base())); 608 } 609 } 610 611 void 612 merge(forward_list& __list) 613 { merge(std::move(__list)); } 614 615 template<typename _Comp> 616 void 617 merge(forward_list&& __list, _Comp __comp) 618 { 619 if (this != &__list) 620 { 621 __glibcxx_check_sorted_pred(_Base::begin(), _Base::end(), __comp); 622 __glibcxx_check_sorted_pred(__list._M_base().begin(), 623 __list._M_base().end(), __comp); 624 this->_M_transfer_from_if(__list, 625 [&__list](_Base_const_iterator __it) 626 { 627 return __it != __list._M_base().cbefore_begin() 628 && __it != __list._M_base().cend(); 629 }); 630 _Base::merge(std::move(__list._M_base()), __comp); 631 } 632 } 633 634 template<typename _Comp> 635 void 636 merge(forward_list& __list, _Comp __comp) 637 { merge(std::move(__list), __comp); } 638 639 using _Base::sort; 640 using _Base::reverse; 641 642 _Base& 643 _M_base() noexcept { return *this; } 644 645 const _Base& 646 _M_base() const noexcept { return *this; } 647 648 private: 649 void 650 _M_invalidate_all() 651 { 652 this->_M_invalidate_if([this](_Base_const_iterator __it) 653 { 654 return __it != this->_M_base().cbefore_begin() 655 && __it != this->_M_base().cend(); 656 }); 657 } 658 typedef __gnu_debug::_Safe_iterator_base _Safe_iterator_base; 659 static void 660 _M_swap_aux(forward_list& __lhs, 661 _Safe_iterator_base*& __lhs_iterators, 662 forward_list& __rhs, 663 _Safe_iterator_base*& __rhs_iterators); 664 void _M_swap(forward_list& __list); 665 }; 666 667 template<typename _Tp, typename _Alloc> 668 void 669 forward_list<_Tp, _Alloc>:: 670 _M_swap_aux(forward_list<_Tp, _Alloc>& __lhs, 671 __gnu_debug::_Safe_iterator_base*& __lhs_iterators, 672 forward_list<_Tp, _Alloc>& __rhs, 673 __gnu_debug::_Safe_iterator_base*& __rhs_iterators) 674 { 675 using __gnu_debug::_Safe_iterator_base; 676 _Safe_iterator_base* __bbegin_its = 0; 677 _Safe_iterator_base* __last_bbegin = 0; 678 for (_Safe_iterator_base* __iter = __lhs_iterators; __iter;) 679 { 680 // Even iterator are casted to const_iterator, not a problem. 681 const_iterator* __victim = static_cast<const_iterator*>(__iter); 682 __iter = __iter->_M_next; 683 if (__victim->base() == __rhs._M_base().cbefore_begin()) 684 { 685 __victim->_M_unlink(); 686 if (__lhs_iterators == __victim) 687 __lhs_iterators = __victim->_M_next; 688 if (__bbegin_its) 689 { 690 __victim->_M_next = __bbegin_its; 691 __bbegin_its->_M_prior = __victim; 692 } 693 else 694 __last_bbegin = __victim; 695 __bbegin_its = __victim; 696 } 697 else 698 __victim->_M_sequence = &__lhs; 699 } 700 701 if (__bbegin_its) 702 { 703 if (__rhs_iterators) 704 { 705 __rhs_iterators->_M_prior = __last_bbegin; 706 __last_bbegin->_M_next = __rhs_iterators; 707 } 708 __rhs_iterators = __bbegin_its; 709 } 710 } 711 712 /* Special forward_list _M_swap version that do not swap the 713 * before-begin ownership.*/ 714 template<typename _Tp, typename _Alloc> 715 void 716 forward_list<_Tp, _Alloc>:: 717 _M_swap(forward_list<_Tp, _Alloc>& __list) 718 { 719 __gnu_cxx::__scoped_lock sentry(this->_M_get_mutex()); 720 std::swap(this->_M_iterators, __list._M_iterators); 721 std::swap(this->_M_const_iterators, __list._M_const_iterators); 722 // Useless, always 1 on forward_list 723 //std::swap(this->_M_version, __list._M_version); 724 _Safe_iterator_base* __this_its = this->_M_iterators; 725 _M_swap_aux(__list, __list._M_iterators, *this, this->_M_iterators); 726 _Safe_iterator_base* __this_const_its = this->_M_const_iterators; 727 _M_swap_aux(__list, __list._M_const_iterators, *this, 728 this->_M_const_iterators); 729 _M_swap_aux(*this, __this_its, __list, __list._M_iterators); 730 _M_swap_aux(*this, __this_const_its, __list, __list._M_const_iterators); 731 } 732 733 template<typename _Tp, typename _Alloc> 734 bool 735 operator==(const forward_list<_Tp, _Alloc>& __lx, 736 const forward_list<_Tp, _Alloc>& __ly) 737 { return __lx._M_base() == __ly._M_base(); } 738 739 template<typename _Tp, typename _Alloc> 740 inline bool 741 operator<(const forward_list<_Tp, _Alloc>& __lx, 742 const forward_list<_Tp, _Alloc>& __ly) 743 { return __lx._M_base() < __ly._M_base(); } 744 745 template<typename _Tp, typename _Alloc> 746 inline bool 747 operator!=(const forward_list<_Tp, _Alloc>& __lx, 748 const forward_list<_Tp, _Alloc>& __ly) 749 { return !(__lx == __ly); } 750 751 /// Based on operator< 752 template<typename _Tp, typename _Alloc> 753 inline bool 754 operator>(const forward_list<_Tp, _Alloc>& __lx, 755 const forward_list<_Tp, _Alloc>& __ly) 756 { return (__ly < __lx); } 757 758 /// Based on operator< 759 template<typename _Tp, typename _Alloc> 760 inline bool 761 operator>=(const forward_list<_Tp, _Alloc>& __lx, 762 const forward_list<_Tp, _Alloc>& __ly) 763 { return !(__lx < __ly); } 764 765 /// Based on operator< 766 template<typename _Tp, typename _Alloc> 767 inline bool 768 operator<=(const forward_list<_Tp, _Alloc>& __lx, 769 const forward_list<_Tp, _Alloc>& __ly) 770 { return !(__ly < __lx); } 771 772 /// See std::forward_list::swap(). 773 template<typename _Tp, typename _Alloc> 774 inline void 775 swap(forward_list<_Tp, _Alloc>& __lx, 776 forward_list<_Tp, _Alloc>& __ly) 777 { __lx.swap(__ly); } 778 779 } // namespace __debug 780 } // namespace std 781 782 namespace __gnu_debug 783 { 784 template<class _Tp, class _Alloc> 785 struct _BeforeBeginHelper<std::__debug::forward_list<_Tp, _Alloc> > 786 { 787 typedef std::__debug::forward_list<_Tp, _Alloc> _Sequence; 788 typedef typename _Sequence::const_iterator _It; 789 typedef typename _It::iterator_type _BaseIt; 790 791 static bool 792 _S_Is(_BaseIt __it, const _Sequence* __seq) 793 { return __it == __seq->_M_base().cbefore_begin(); } 794 795 static bool 796 _S_Is_Beginnest(_BaseIt __it, const _Sequence* __seq) 797 { return _S_Is(__it, __seq); } 798 }; 799 } 800 801 #endif 802
