libstdc++
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00001 // <forward_list> -*- C++ -*- 00002 00003 // Copyright (C) 2010-2019 Free Software Foundation, Inc. 00004 // 00005 // This file is part of the GNU ISO C++ Library. This library is free 00006 // software; you can redistribute it and/or modify it under the 00007 // terms of the GNU General Public License as published by the 00008 // Free Software Foundation; either version 3, or (at your option) 00009 // any later version. 00010 00011 // This library is distributed in the hope that it will be useful, 00012 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00014 // GNU General Public License for more details. 00015 00016 // Under Section 7 of GPL version 3, you are granted additional 00017 // permissions described in the GCC Runtime Library Exception, version 00018 // 3.1, as published by the Free Software Foundation. 00019 00020 // You should have received a copy of the GNU General Public License and 00021 // a copy of the GCC Runtime Library Exception along with this program; 00022 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 00023 // <http://www.gnu.org/licenses/>. 00024 00025 /** @file debug/forward_list 00026 * This file is a GNU debug extension to the Standard C++ Library. 00027 */ 00028 00029 #ifndef _GLIBCXX_DEBUG_FORWARD_LIST 00030 #define _GLIBCXX_DEBUG_FORWARD_LIST 1 00031 00032 #pragma GCC system_header 00033 00034 #include <bits/c++config.h> 00035 namespace std _GLIBCXX_VISIBILITY(default) { namespace __debug { 00036 template<typename _Tp, typename _Allocator> class forward_list; 00037 } } // namespace std::__debug 00038 00039 #include <forward_list> 00040 #include <debug/safe_sequence.h> 00041 #include <debug/safe_container.h> 00042 #include <debug/safe_iterator.h> 00043 00044 // Special validity check for forward_list ranges. 00045 #define __glibcxx_check_valid_fl_range(_First,_Last,_Dist) \ 00046 _GLIBCXX_DEBUG_VERIFY(_First._M_valid_range(_Last, _Dist, false), \ 00047 _M_message(__gnu_debug::__msg_valid_range) \ 00048 ._M_iterator(_First, #_First) \ 00049 ._M_iterator(_Last, #_Last)) 00050 00051 namespace __gnu_debug 00052 { 00053 /// Special iterators swap and invalidation for forward_list because of the 00054 /// before_begin iterator. 00055 template<typename _SafeSequence> 00056 class _Safe_forward_list 00057 : public _Safe_sequence<_SafeSequence> 00058 { 00059 _SafeSequence& 00060 _M_this() noexcept 00061 { return *static_cast<_SafeSequence*>(this); } 00062 00063 static void 00064 _M_swap_aux(_Safe_sequence_base& __lhs, 00065 _Safe_iterator_base*& __lhs_iterators, 00066 _Safe_sequence_base& __rhs, 00067 _Safe_iterator_base*& __rhs_iterators); 00068 00069 void _M_swap_single(_Safe_sequence_base&) noexcept; 00070 00071 protected: 00072 void 00073 _M_invalidate_all() 00074 { 00075 using _Base_const_iterator = __decltype(_M_this()._M_base().cend()); 00076 this->_M_invalidate_if([this](_Base_const_iterator __it) 00077 { 00078 return __it != _M_this()._M_base().cbefore_begin() 00079 && __it != _M_this()._M_base().cend(); }); 00080 } 00081 00082 void _M_swap(_Safe_sequence_base&) noexcept; 00083 }; 00084 00085 template<typename _SafeSequence> 00086 void 00087 _Safe_forward_list<_SafeSequence>:: 00088 _M_swap_aux(_Safe_sequence_base& __lhs, 00089 _Safe_iterator_base*& __lhs_iterators, 00090 _Safe_sequence_base& __rhs, 00091 _Safe_iterator_base*& __rhs_iterators) 00092 { 00093 using const_iterator = typename _SafeSequence::const_iterator; 00094 _Safe_iterator_base* __bbegin_its = 0; 00095 _Safe_iterator_base* __last_bbegin = 0; 00096 _SafeSequence& __rseq = static_cast<_SafeSequence&>(__rhs); 00097 00098 for (_Safe_iterator_base* __iter = __lhs_iterators; __iter;) 00099 { 00100 // Even iterator is cast to const_iterator, not a problem. 00101 _Safe_iterator_base* __victim_base = __iter; 00102 const_iterator* __victim = 00103 static_cast<const_iterator*>(__victim_base); 00104 __iter = __iter->_M_next; 00105 if (__victim->base() == __rseq._M_base().cbefore_begin()) 00106 { 00107 __victim->_M_unlink(); 00108 if (__lhs_iterators == __victim_base) 00109 __lhs_iterators = __victim_base->_M_next; 00110 if (__bbegin_its) 00111 { 00112 __victim_base->_M_next = __bbegin_its; 00113 __bbegin_its->_M_prior = __victim_base; 00114 } 00115 else 00116 __last_bbegin = __victim_base; 00117 __bbegin_its = __victim_base; 00118 } 00119 else 00120 __victim_base->_M_sequence = std::__addressof(__lhs); 00121 } 00122 00123 if (__bbegin_its) 00124 { 00125 if (__rhs_iterators) 00126 { 00127 __rhs_iterators->_M_prior = __last_bbegin; 00128 __last_bbegin->_M_next = __rhs_iterators; 00129 } 00130 __rhs_iterators = __bbegin_its; 00131 } 00132 } 00133 00134 template<typename _SafeSequence> 00135 void 00136 _Safe_forward_list<_SafeSequence>:: 00137 _M_swap_single(_Safe_sequence_base& __other) noexcept 00138 { 00139 std::swap(_M_this()._M_iterators, __other._M_iterators); 00140 std::swap(_M_this()._M_const_iterators, __other._M_const_iterators); 00141 // Useless, always 1 on forward_list 00142 //std::swap(_M_this()_M_version, __other._M_version); 00143 _Safe_iterator_base* __this_its = _M_this()._M_iterators; 00144 _M_swap_aux(__other, __other._M_iterators, 00145 _M_this(), _M_this()._M_iterators); 00146 _Safe_iterator_base* __this_const_its = _M_this()._M_const_iterators; 00147 _M_swap_aux(__other, __other._M_const_iterators, 00148 _M_this(), _M_this()._M_const_iterators); 00149 _M_swap_aux(_M_this(), __this_its, 00150 __other, __other._M_iterators); 00151 _M_swap_aux(_M_this(), __this_const_its, 00152 __other, __other._M_const_iterators); 00153 } 00154 00155 /* Special forward_list _M_swap version that does not swap the 00156 * before-begin ownership.*/ 00157 template<typename _SafeSequence> 00158 void 00159 _Safe_forward_list<_SafeSequence>:: 00160 _M_swap(_Safe_sequence_base& __other) noexcept 00161 { 00162 // We need to lock both sequences to swap 00163 using namespace __gnu_cxx; 00164 __mutex *__this_mutex = &_M_this()._M_get_mutex(); 00165 __mutex *__other_mutex = 00166 &static_cast<_SafeSequence&>(__other)._M_get_mutex(); 00167 if (__this_mutex == __other_mutex) 00168 { 00169 __scoped_lock __lock(*__this_mutex); 00170 _M_swap_single(__other); 00171 } 00172 else 00173 { 00174 __scoped_lock __l1(__this_mutex < __other_mutex 00175 ? *__this_mutex : *__other_mutex); 00176 __scoped_lock __l2(__this_mutex < __other_mutex 00177 ? *__other_mutex : *__this_mutex); 00178 _M_swap_single(__other); 00179 } 00180 } 00181 } 00182 00183 namespace std _GLIBCXX_VISIBILITY(default) 00184 { 00185 namespace __debug 00186 { 00187 /// Class std::forward_list with safety/checking/debug instrumentation. 00188 template<typename _Tp, typename _Alloc = std::allocator<_Tp> > 00189 class forward_list 00190 : public __gnu_debug::_Safe_container< 00191 forward_list<_Tp, _Alloc>, _Alloc, __gnu_debug::_Safe_forward_list>, 00192 public _GLIBCXX_STD_C::forward_list<_Tp, _Alloc> 00193 { 00194 typedef _GLIBCXX_STD_C::forward_list<_Tp, _Alloc> _Base; 00195 typedef __gnu_debug::_Safe_container< 00196 forward_list, _Alloc, __gnu_debug::_Safe_forward_list> _Safe; 00197 00198 typedef typename _Base::iterator _Base_iterator; 00199 typedef typename _Base::const_iterator _Base_const_iterator; 00200 00201 template<typename _ItT, typename _SeqT, typename _CatT> 00202 friend class ::__gnu_debug::_Safe_iterator; 00203 00204 public: 00205 typedef typename _Base::reference reference; 00206 typedef typename _Base::const_reference const_reference; 00207 00208 typedef __gnu_debug::_Safe_iterator< 00209 _Base_iterator, forward_list> iterator; 00210 typedef __gnu_debug::_Safe_iterator< 00211 _Base_const_iterator, forward_list> const_iterator; 00212 00213 typedef typename _Base::size_type size_type; 00214 typedef typename _Base::difference_type difference_type; 00215 00216 typedef _Tp value_type; 00217 typedef typename _Base::allocator_type allocator_type; 00218 typedef typename _Base::pointer pointer; 00219 typedef typename _Base::const_pointer const_pointer; 00220 00221 // 23.2.3.1 construct/copy/destroy: 00222 00223 forward_list() = default; 00224 00225 explicit 00226 forward_list(const allocator_type& __al) noexcept 00227 : _Base(__al) { } 00228 00229 forward_list(const forward_list& __list, const allocator_type& __al) 00230 : _Base(__list, __al) 00231 { } 00232 00233 forward_list(forward_list&& __list, const allocator_type& __al) 00234 : _Safe(std::move(__list._M_safe()), __al), 00235 _Base(std::move(__list._M_base()), __al) 00236 { } 00237 00238 explicit 00239 forward_list(size_type __n, const allocator_type& __al = allocator_type()) 00240 : _Base(__n, __al) 00241 { } 00242 00243 forward_list(size_type __n, const _Tp& __value, 00244 const allocator_type& __al = allocator_type()) 00245 : _Base(__n, __value, __al) 00246 { } 00247 00248 template<typename _InputIterator, 00249 typename = std::_RequireInputIter<_InputIterator>> 00250 forward_list(_InputIterator __first, _InputIterator __last, 00251 const allocator_type& __al = allocator_type()) 00252 : _Base(__gnu_debug::__base( 00253 __glibcxx_check_valid_constructor_range(__first, __last)), 00254 __gnu_debug::__base(__last), __al) 00255 { } 00256 00257 forward_list(const forward_list&) = default; 00258 00259 forward_list(forward_list&&) = default; 00260 00261 forward_list(std::initializer_list<_Tp> __il, 00262 const allocator_type& __al = allocator_type()) 00263 : _Base(__il, __al) 00264 { } 00265 00266 ~forward_list() = default; 00267 00268 forward_list& 00269 operator=(const forward_list&) = default; 00270 00271 forward_list& 00272 operator=(forward_list&&) = default; 00273 00274 forward_list& 00275 operator=(std::initializer_list<_Tp> __il) 00276 { 00277 _M_base() = __il; 00278 this->_M_invalidate_all(); 00279 return *this; 00280 } 00281 00282 template<typename _InputIterator, 00283 typename = std::_RequireInputIter<_InputIterator>> 00284 void 00285 assign(_InputIterator __first, _InputIterator __last) 00286 { 00287 typename __gnu_debug::_Distance_traits<_InputIterator>::__type __dist; 00288 __glibcxx_check_valid_range2(__first, __last, __dist); 00289 00290 if (__dist.second >= __gnu_debug::__dp_sign) 00291 _Base::assign(__gnu_debug::__unsafe(__first), 00292 __gnu_debug::__unsafe(__last)); 00293 else 00294 _Base::assign(__first, __last); 00295 00296 this->_M_invalidate_all(); 00297 } 00298 00299 void 00300 assign(size_type __n, const _Tp& __val) 00301 { 00302 _Base::assign(__n, __val); 00303 this->_M_invalidate_all(); 00304 } 00305 00306 void 00307 assign(std::initializer_list<_Tp> __il) 00308 { 00309 _Base::assign(__il); 00310 this->_M_invalidate_all(); 00311 } 00312 00313 using _Base::get_allocator; 00314 00315 // iterators: 00316 00317 iterator 00318 before_begin() noexcept 00319 { return { _Base::before_begin(), this }; } 00320 00321 const_iterator 00322 before_begin() const noexcept 00323 { return { _Base::before_begin(), this }; } 00324 00325 iterator 00326 begin() noexcept 00327 { return { _Base::begin(), this }; } 00328 00329 const_iterator 00330 begin() const noexcept 00331 { return { _Base::begin(), this }; } 00332 00333 iterator 00334 end() noexcept 00335 { return { _Base::end(), this }; } 00336 00337 const_iterator 00338 end() const noexcept 00339 { return { _Base::end(), this }; } 00340 00341 const_iterator 00342 cbegin() const noexcept 00343 { return { _Base::cbegin(), this }; } 00344 00345 const_iterator 00346 cbefore_begin() const noexcept 00347 { return { _Base::cbefore_begin(), this }; } 00348 00349 const_iterator 00350 cend() const noexcept 00351 { return { _Base::cend(), this }; } 00352 00353 using _Base::empty; 00354 using _Base::max_size; 00355 00356 // element access: 00357 00358 reference 00359 front() 00360 { 00361 __glibcxx_check_nonempty(); 00362 return _Base::front(); 00363 } 00364 00365 const_reference 00366 front() const 00367 { 00368 __glibcxx_check_nonempty(); 00369 return _Base::front(); 00370 } 00371 00372 // modifiers: 00373 00374 using _Base::emplace_front; 00375 using _Base::push_front; 00376 00377 void 00378 pop_front() 00379 { 00380 __glibcxx_check_nonempty(); 00381 this->_M_invalidate_if([this](_Base_const_iterator __it) 00382 { return __it == this->_M_base().cbegin(); }); 00383 _Base::pop_front(); 00384 } 00385 00386 template<typename... _Args> 00387 iterator 00388 emplace_after(const_iterator __pos, _Args&&... __args) 00389 { 00390 __glibcxx_check_insert_after(__pos); 00391 return { _Base::emplace_after(__pos.base(), 00392 std::forward<_Args>(__args)...), 00393 this }; 00394 } 00395 00396 iterator 00397 insert_after(const_iterator __pos, const _Tp& __val) 00398 { 00399 __glibcxx_check_insert_after(__pos); 00400 return { _Base::insert_after(__pos.base(), __val), this }; 00401 } 00402 00403 iterator 00404 insert_after(const_iterator __pos, _Tp&& __val) 00405 { 00406 __glibcxx_check_insert_after(__pos); 00407 return { _Base::insert_after(__pos.base(), std::move(__val)), this }; 00408 } 00409 00410 iterator 00411 insert_after(const_iterator __pos, size_type __n, const _Tp& __val) 00412 { 00413 __glibcxx_check_insert_after(__pos); 00414 return { _Base::insert_after(__pos.base(), __n, __val), this }; 00415 } 00416 00417 template<typename _InputIterator, 00418 typename = std::_RequireInputIter<_InputIterator>> 00419 iterator 00420 insert_after(const_iterator __pos, 00421 _InputIterator __first, _InputIterator __last) 00422 { 00423 typename __gnu_debug::_Distance_traits<_InputIterator>::__type __dist; 00424 __glibcxx_check_insert_range_after(__pos, __first, __last, __dist); 00425 00426 if (__dist.second >= __gnu_debug::__dp_sign) 00427 return 00428 { 00429 _Base::insert_after(__pos.base(), 00430 __gnu_debug::__unsafe(__first), 00431 __gnu_debug::__unsafe(__last)), 00432 this 00433 }; 00434 else 00435 return { _Base::insert_after(__pos.base(), __first, __last), this }; 00436 } 00437 00438 iterator 00439 insert_after(const_iterator __pos, std::initializer_list<_Tp> __il) 00440 { 00441 __glibcxx_check_insert_after(__pos); 00442 return { _Base::insert_after(__pos.base(), __il), this }; 00443 } 00444 00445 private: 00446 _Base_iterator 00447 _M_erase_after(_Base_const_iterator __pos) 00448 { 00449 _Base_const_iterator __next = std::next(__pos); 00450 this->_M_invalidate_if([__next](_Base_const_iterator __it) 00451 { return __it == __next; }); 00452 return _Base::erase_after(__pos); 00453 } 00454 public: 00455 iterator 00456 erase_after(const_iterator __pos) 00457 { 00458 __glibcxx_check_erase_after(__pos); 00459 return { _M_erase_after(__pos.base()), this }; 00460 } 00461 00462 iterator 00463 erase_after(const_iterator __pos, const_iterator __last) 00464 { 00465 __glibcxx_check_erase_range_after(__pos, __last); 00466 for (_Base_const_iterator __victim = std::next(__pos.base()); 00467 __victim != __last.base(); ++__victim) 00468 { 00469 _GLIBCXX_DEBUG_VERIFY(__victim != _Base::cend(), 00470 _M_message(__gnu_debug::__msg_valid_range2) 00471 ._M_sequence(*this, "this") 00472 ._M_iterator(__pos, "pos") 00473 ._M_iterator(__last, "last")); 00474 this->_M_invalidate_if([__victim](_Base_const_iterator __it) 00475 { return __it == __victim; }); 00476 } 00477 00478 return { _Base::erase_after(__pos.base(), __last.base()), this }; 00479 } 00480 00481 void 00482 swap(forward_list& __list) 00483 noexcept( noexcept(declval<_Base&>().swap(__list)) ) 00484 { 00485 _Safe::_M_swap(__list); 00486 _Base::swap(__list); 00487 } 00488 00489 void 00490 resize(size_type __sz) 00491 { 00492 this->_M_detach_singular(); 00493 00494 // if __sz < size(), invalidate all iterators in [begin+__sz, end() 00495 _Base_iterator __victim = _Base::begin(); 00496 _Base_iterator __end = _Base::end(); 00497 for (size_type __i = __sz; __victim != __end && __i > 0; --__i) 00498 ++__victim; 00499 00500 for (; __victim != __end; ++__victim) 00501 { 00502 this->_M_invalidate_if([__victim](_Base_const_iterator __it) 00503 { return __it == __victim; }); 00504 } 00505 00506 __try 00507 { 00508 _Base::resize(__sz); 00509 } 00510 __catch(...) 00511 { 00512 this->_M_revalidate_singular(); 00513 __throw_exception_again; 00514 } 00515 } 00516 00517 void 00518 resize(size_type __sz, const value_type& __val) 00519 { 00520 this->_M_detach_singular(); 00521 00522 // if __sz < size(), invalidate all iterators in [begin+__sz, end()) 00523 _Base_iterator __victim = _Base::begin(); 00524 _Base_iterator __end = _Base::end(); 00525 for (size_type __i = __sz; __victim != __end && __i > 0; --__i) 00526 ++__victim; 00527 00528 for (; __victim != __end; ++__victim) 00529 { 00530 this->_M_invalidate_if([__victim](_Base_const_iterator __it) 00531 { return __it == __victim; }); 00532 } 00533 00534 __try 00535 { 00536 _Base::resize(__sz, __val); 00537 } 00538 __catch(...) 00539 { 00540 this->_M_revalidate_singular(); 00541 __throw_exception_again; 00542 } 00543 } 00544 00545 void 00546 clear() noexcept 00547 { 00548 _Base::clear(); 00549 this->_M_invalidate_all(); 00550 } 00551 00552 // 23.2.3.5 forward_list operations: 00553 void 00554 splice_after(const_iterator __pos, forward_list&& __list) 00555 { 00556 __glibcxx_check_insert_after(__pos); 00557 _GLIBCXX_DEBUG_VERIFY(std::__addressof(__list) != this, 00558 _M_message(__gnu_debug::__msg_self_splice) 00559 ._M_sequence(*this, "this")); 00560 _GLIBCXX_DEBUG_VERIFY(__list.get_allocator() == this->get_allocator(), 00561 _M_message(__gnu_debug::__msg_splice_alloc) 00562 ._M_sequence(*this) 00563 ._M_sequence(__list, "__list")); 00564 this->_M_transfer_from_if(__list, [&__list](_Base_const_iterator __it) 00565 { 00566 return __it != __list._M_base().cbefore_begin() 00567 && __it != __list._M_base().end(); 00568 }); 00569 _Base::splice_after(__pos.base(), std::move(__list._M_base())); 00570 } 00571 00572 void 00573 splice_after(const_iterator __pos, forward_list& __list) 00574 { splice_after(__pos, std::move(__list)); } 00575 00576 void 00577 splice_after(const_iterator __pos, forward_list&& __list, 00578 const_iterator __i) 00579 { 00580 __glibcxx_check_insert_after(__pos); 00581 _GLIBCXX_DEBUG_VERIFY(__i._M_before_dereferenceable(), 00582 _M_message(__gnu_debug::__msg_splice_bad) 00583 ._M_iterator(__i, "__i")); 00584 _GLIBCXX_DEBUG_VERIFY(__i._M_attached_to(std::__addressof(__list)), 00585 _M_message(__gnu_debug::__msg_splice_other) 00586 ._M_iterator(__i, "__i") 00587 ._M_sequence(__list, "__list")); 00588 _GLIBCXX_DEBUG_VERIFY(__list.get_allocator() == this->get_allocator(), 00589 _M_message(__gnu_debug::__msg_splice_alloc) 00590 ._M_sequence(*this) 00591 ._M_sequence(__list, "__list")); 00592 00593 // _GLIBCXX_RESOLVE_LIB_DEFECTS 00594 // 250. splicing invalidates iterators 00595 _Base_const_iterator __next = std::next(__i.base()); 00596 this->_M_transfer_from_if(__list, [__next](_Base_const_iterator __it) 00597 { return __it == __next; }); 00598 _Base::splice_after(__pos.base(), std::move(__list._M_base()), 00599 __i.base()); 00600 } 00601 00602 void 00603 splice_after(const_iterator __pos, forward_list& __list, 00604 const_iterator __i) 00605 { splice_after(__pos, std::move(__list), __i); } 00606 00607 void 00608 splice_after(const_iterator __pos, forward_list&& __list, 00609 const_iterator __before, const_iterator __last) 00610 { 00611 typename __gnu_debug::_Distance_traits<const_iterator>::__type __dist; 00612 auto __listptr = std::__addressof(__list); 00613 __glibcxx_check_insert_after(__pos); 00614 __glibcxx_check_valid_fl_range(__before, __last, __dist); 00615 _GLIBCXX_DEBUG_VERIFY(__before._M_attached_to(__listptr), 00616 _M_message(__gnu_debug::__msg_splice_other) 00617 ._M_sequence(__list, "list") 00618 ._M_iterator(__before, "before")); 00619 _GLIBCXX_DEBUG_VERIFY(__before._M_dereferenceable() 00620 || __before._M_is_before_begin(), 00621 _M_message(__gnu_debug::__msg_valid_range2) 00622 ._M_sequence(__list, "list") 00623 ._M_iterator(__before, "before") 00624 ._M_iterator(__last, "last")); 00625 _GLIBCXX_DEBUG_VERIFY(__before != __last, 00626 _M_message(__gnu_debug::__msg_valid_range2) 00627 ._M_sequence(__list, "list") 00628 ._M_iterator(__before, "before") 00629 ._M_iterator(__last, "last")); 00630 _GLIBCXX_DEBUG_VERIFY(__list.get_allocator() == this->get_allocator(), 00631 _M_message(__gnu_debug::__msg_splice_alloc) 00632 ._M_sequence(*this) 00633 ._M_sequence(__list, "__list")); 00634 00635 for (_Base_const_iterator __tmp = std::next(__before.base()); 00636 __tmp != __last.base(); ++__tmp) 00637 { 00638 _GLIBCXX_DEBUG_VERIFY(__tmp != __list._M_base().end(), 00639 _M_message(__gnu_debug::__msg_valid_range2) 00640 ._M_sequence(__list, "list") 00641 ._M_iterator(__before, "before") 00642 ._M_iterator(__last, "last")); 00643 _GLIBCXX_DEBUG_VERIFY(__listptr != this || __tmp != __pos.base(), 00644 _M_message(__gnu_debug::__msg_splice_overlap) 00645 ._M_iterator(__tmp, "position") 00646 ._M_iterator(__before, "before") 00647 ._M_iterator(__last, "last")); 00648 // _GLIBCXX_RESOLVE_LIB_DEFECTS 00649 // 250. splicing invalidates iterators 00650 this->_M_transfer_from_if(__list, [__tmp](_Base_const_iterator __it) 00651 { return __it == __tmp; }); 00652 } 00653 00654 _Base::splice_after(__pos.base(), std::move(__list._M_base()), 00655 __before.base(), __last.base()); 00656 } 00657 00658 void 00659 splice_after(const_iterator __pos, forward_list& __list, 00660 const_iterator __before, const_iterator __last) 00661 { splice_after(__pos, std::move(__list), __before, __last); } 00662 00663 private: 00664 #if __cplusplus > 201703L 00665 using __remove_return_type = size_type; 00666 # define _GLIBCXX_FWDLIST_REMOVE_RETURN_TYPE_TAG \ 00667 __attribute__((__abi_tag__("__cxx20"))) 00668 # define _GLIBCXX20_ONLY(__expr) __expr 00669 #else 00670 using __remove_return_type = void; 00671 # define _GLIBCXX_FWDLIST_REMOVE_RETURN_TYPE_TAG 00672 # define _GLIBCXX20_ONLY(__expr) 00673 #endif 00674 00675 public: 00676 _GLIBCXX_FWDLIST_REMOVE_RETURN_TYPE_TAG 00677 __remove_return_type 00678 remove(const _Tp& __val) 00679 { 00680 if (!this->_M_iterators && !this->_M_const_iterators) 00681 return _Base::remove(__val); 00682 00683 size_type __removed __attribute__((__unused__)) = 0; 00684 _Base_iterator __x = _Base::before_begin(); 00685 _Base_iterator __old = __x++; 00686 _Base_iterator __extra = _Base::end(); 00687 while (__x != _Base::end()) 00688 { 00689 if (*__x == __val) 00690 { 00691 if (std::__addressof(*__x) != std::__addressof(__val)) 00692 { 00693 __x = _M_erase_after(__old); 00694 _GLIBCXX20_ONLY( __removed++ ); 00695 continue; 00696 } 00697 else 00698 __extra = __old; 00699 } 00700 __old = __x++; 00701 } 00702 00703 if (__extra != _Base::end()) 00704 { 00705 this->_M_erase_after(__extra); 00706 _GLIBCXX20_ONLY( __removed++ ); 00707 } 00708 00709 return _GLIBCXX20_ONLY( __removed ); 00710 } 00711 00712 template<typename _Pred> 00713 __remove_return_type 00714 remove_if(_Pred __pred) 00715 { 00716 if (!this->_M_iterators && !this->_M_const_iterators) 00717 return _Base::remove_if(__pred); 00718 00719 size_type __removed __attribute__((__unused__)) = 0; 00720 _Base_iterator __x = _Base::before_begin(); 00721 _Base_iterator __old = __x++; 00722 while (__x != _Base::end()) 00723 if (__pred(*__x)) 00724 { 00725 __x = _M_erase_after(__old); 00726 _GLIBCXX20_ONLY( __removed++ ); 00727 } 00728 else 00729 __old = __x++; 00730 00731 return _GLIBCXX20_ONLY( __removed ); 00732 } 00733 00734 _GLIBCXX_FWDLIST_REMOVE_RETURN_TYPE_TAG 00735 __remove_return_type 00736 unique() 00737 { return unique(std::equal_to<_Tp>()); } 00738 00739 template<typename _BinPred> 00740 __remove_return_type 00741 unique(_BinPred __binary_pred) 00742 { 00743 if (!this->_M_iterators && !this->_M_const_iterators) 00744 return _Base::unique(__binary_pred); 00745 00746 _Base_iterator __first = _Base::begin(); 00747 _Base_iterator __last = _Base::end(); 00748 if (__first == __last) 00749 return _GLIBCXX20_ONLY(0); 00750 00751 size_type __removed __attribute__((__unused__)) = 0; 00752 _Base_iterator __next = std::next(__first); 00753 while (__next != __last) 00754 { 00755 if (__binary_pred(*__first, *__next)) 00756 { 00757 __next = _M_erase_after(__first); 00758 _GLIBCXX20_ONLY( __removed++ ); 00759 } 00760 else 00761 __first = __next++; 00762 } 00763 00764 return _GLIBCXX20_ONLY( __removed ); 00765 } 00766 00767 #undef _GLIBCXX_FWDLIST_REMOVE_RETURN_TYPE_TAG 00768 #undef _GLIBCXX20_ONLY 00769 00770 void 00771 merge(forward_list&& __list) 00772 { 00773 if (this != std::__addressof(__list)) 00774 { 00775 __glibcxx_check_sorted(_Base::begin(), _Base::end()); 00776 __glibcxx_check_sorted(__list._M_base().begin(), 00777 __list._M_base().end()); 00778 this->_M_transfer_from_if(__list, [&__list](_Base_const_iterator __it) 00779 { 00780 return __it != __list._M_base().cbefore_begin() 00781 && __it != __list._M_base().cend(); 00782 }); 00783 _Base::merge(std::move(__list._M_base())); 00784 } 00785 } 00786 00787 void 00788 merge(forward_list& __list) 00789 { merge(std::move(__list)); } 00790 00791 template<typename _Comp> 00792 void 00793 merge(forward_list&& __list, _Comp __comp) 00794 { 00795 if (this != std::__addressof(__list)) 00796 { 00797 __glibcxx_check_sorted_pred(_Base::begin(), _Base::end(), __comp); 00798 __glibcxx_check_sorted_pred(__list._M_base().begin(), 00799 __list._M_base().end(), __comp); 00800 this->_M_transfer_from_if(__list, 00801 [&__list](_Base_const_iterator __it) 00802 { 00803 return __it != __list._M_base().cbefore_begin() 00804 && __it != __list._M_base().cend(); 00805 }); 00806 _Base::merge(std::move(__list._M_base()), __comp); 00807 } 00808 } 00809 00810 template<typename _Comp> 00811 void 00812 merge(forward_list& __list, _Comp __comp) 00813 { merge(std::move(__list), __comp); } 00814 00815 using _Base::sort; 00816 using _Base::reverse; 00817 00818 _Base& 00819 _M_base() noexcept { return *this; } 00820 00821 const _Base& 00822 _M_base() const noexcept { return *this; } 00823 }; 00824 00825 #if __cpp_deduction_guides >= 201606 00826 template<typename _InputIterator, typename _ValT 00827 = typename iterator_traits<_InputIterator>::value_type, 00828 typename _Allocator = allocator<_ValT>, 00829 typename = _RequireInputIter<_InputIterator>, 00830 typename = _RequireAllocator<_Allocator>> 00831 forward_list(_InputIterator, _InputIterator, _Allocator = _Allocator()) 00832 -> forward_list<_ValT, _Allocator>; 00833 #endif 00834 00835 template<typename _Tp, typename _Alloc> 00836 bool 00837 operator==(const forward_list<_Tp, _Alloc>& __lx, 00838 const forward_list<_Tp, _Alloc>& __ly) 00839 { return __lx._M_base() == __ly._M_base(); } 00840 00841 template<typename _Tp, typename _Alloc> 00842 inline bool 00843 operator<(const forward_list<_Tp, _Alloc>& __lx, 00844 const forward_list<_Tp, _Alloc>& __ly) 00845 { return __lx._M_base() < __ly._M_base(); } 00846 00847 template<typename _Tp, typename _Alloc> 00848 inline bool 00849 operator!=(const forward_list<_Tp, _Alloc>& __lx, 00850 const forward_list<_Tp, _Alloc>& __ly) 00851 { return !(__lx == __ly); } 00852 00853 /// Based on operator< 00854 template<typename _Tp, typename _Alloc> 00855 inline bool 00856 operator>(const forward_list<_Tp, _Alloc>& __lx, 00857 const forward_list<_Tp, _Alloc>& __ly) 00858 { return (__ly < __lx); } 00859 00860 /// Based on operator< 00861 template<typename _Tp, typename _Alloc> 00862 inline bool 00863 operator>=(const forward_list<_Tp, _Alloc>& __lx, 00864 const forward_list<_Tp, _Alloc>& __ly) 00865 { return !(__lx < __ly); } 00866 00867 /// Based on operator< 00868 template<typename _Tp, typename _Alloc> 00869 inline bool 00870 operator<=(const forward_list<_Tp, _Alloc>& __lx, 00871 const forward_list<_Tp, _Alloc>& __ly) 00872 { return !(__ly < __lx); } 00873 00874 /// See std::forward_list::swap(). 00875 template<typename _Tp, typename _Alloc> 00876 inline void 00877 swap(forward_list<_Tp, _Alloc>& __lx, forward_list<_Tp, _Alloc>& __ly) 00878 noexcept(noexcept(__lx.swap(__ly))) 00879 { __lx.swap(__ly); } 00880 00881 } // namespace __debug 00882 } // namespace std 00883 00884 namespace __gnu_debug 00885 { 00886 template<typename _Tp, typename _Alloc> 00887 struct _BeforeBeginHelper<std::__debug::forward_list<_Tp, _Alloc> > 00888 { 00889 typedef std::__debug::forward_list<_Tp, _Alloc> _Sequence; 00890 00891 template<typename _Iterator> 00892 static bool 00893 _S_Is(const _Safe_iterator<_Iterator, _Sequence>& __it) 00894 { 00895 return 00896 __it.base() == __it._M_get_sequence()->_M_base().before_begin(); 00897 } 00898 00899 template<typename _Iterator> 00900 static bool 00901 _S_Is_Beginnest(const _Safe_iterator<_Iterator, _Sequence>& __it) 00902 { return _S_Is(__it); } 00903 }; 00904 00905 template<typename _Tp, typename _Alloc> 00906 struct _Sequence_traits<std::__debug::forward_list<_Tp, _Alloc> > 00907 { 00908 typedef typename std::__debug::forward_list<_Tp, _Alloc>::iterator _It; 00909 00910 static typename _Distance_traits<_It>::__type 00911 _S_size(const std::__debug::forward_list<_Tp, _Alloc>& __seq) 00912 { 00913 return __seq.empty() 00914 ? std::make_pair(0, __dp_exact) : std::make_pair(1, __dp_equality); 00915 } 00916 }; 00917 00918 #ifndef _GLIBCXX_DEBUG_PEDANTIC 00919 template<class _Tp, class _Alloc> 00920 struct _Insert_range_from_self_is_safe< 00921 std::__debug::forward_list<_Tp, _Alloc> > 00922 { enum { __value = 1 }; }; 00923 #endif 00924 } 00925 00926 #endif