8b7af071b0
Respect DR 526 in implementation of std::[forward_]list remove/remove_if/unique. [forward_]list::remove was already implementing it but the implementation has been modified to generalize the following pattern. All nodes to remove are collected in an intermediate [forward_]list which purpose is just to be detroyed once out of scope. libstdc++-v3/ChangeLog: PR libstdc++/91620 * include/bits/forward_list.tcc (forward_list<>::remove): Collect nodes to destroy in an intermediate forward_list. (forward_list<>::remove_if, forward_list<>::unique): Likewise. * include/bits/list.tcc (list<>::remove, list<>::unique): Likewise. (list<>::remove_if): Likewise. * include/debug/forward_list (forward_list<>::_M_erase_after): Remove. (forward_list<>::erase_after): Adapt. (forward_list<>::remove, forward_list<>::remove_if): Collect nodes to destroy in an intermediate forward_list. (forward_list<>::unique): Likewise. * include/debug/list (list<>::remove, list<>::unique): Likewise. (list<>::remove_if): Likewise. * testsuite/23_containers/forward_list/operations/91620.cc: New test. * testsuite/23_containers/list/operations/91620.cc: New test.
664 lines
17 KiB
C++
664 lines
17 KiB
C++
// List implementation (out of line) -*- C++ -*-
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// Copyright (C) 2001-2020 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// Under Section 7 of GPL version 3, you are granted additional
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// permissions described in the GCC Runtime Library Exception, version
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// 3.1, as published by the Free Software Foundation.
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// You should have received a copy of the GNU General Public License and
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// a copy of the GCC Runtime Library Exception along with this program;
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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// <http://www.gnu.org/licenses/>.
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/*
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*
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* Copyright (c) 1994
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* Hewlett-Packard Company
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*
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* Permission to use, copy, modify, distribute and sell this software
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* and its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies and
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* that both that copyright notice and this permission notice appear
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* in supporting documentation. Hewlett-Packard Company makes no
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* representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied warranty.
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*
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*
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* Copyright (c) 1996,1997
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* Silicon Graphics Computer Systems, Inc.
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*
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* Permission to use, copy, modify, distribute and sell this software
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* and its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies and
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* that both that copyright notice and this permission notice appear
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* in supporting documentation. Silicon Graphics makes no
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* representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied warranty.
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*/
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/** @file bits/list.tcc
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* This is an internal header file, included by other library headers.
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* Do not attempt to use it directly. @headername{list}
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*/
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#ifndef _LIST_TCC
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#define _LIST_TCC 1
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namespace std _GLIBCXX_VISIBILITY(default)
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{
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_GLIBCXX_BEGIN_NAMESPACE_VERSION
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_GLIBCXX_BEGIN_NAMESPACE_CONTAINER
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template<typename _Tp, typename _Alloc>
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void
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_List_base<_Tp, _Alloc>::
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_M_clear() _GLIBCXX_NOEXCEPT
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{
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typedef _List_node<_Tp> _Node;
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__detail::_List_node_base* __cur = _M_impl._M_node._M_next;
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while (__cur != &_M_impl._M_node)
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{
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_Node* __tmp = static_cast<_Node*>(__cur);
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__cur = __tmp->_M_next;
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_Tp* __val = __tmp->_M_valptr();
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#if __cplusplus >= 201103L
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_Node_alloc_traits::destroy(_M_get_Node_allocator(), __val);
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#else
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_Tp_alloc_type(_M_get_Node_allocator()).destroy(__val);
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#endif
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_M_put_node(__tmp);
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}
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}
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#if __cplusplus >= 201103L
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template<typename _Tp, typename _Alloc>
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template<typename... _Args>
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typename list<_Tp, _Alloc>::iterator
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list<_Tp, _Alloc>::
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emplace(const_iterator __position, _Args&&... __args)
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{
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_Node* __tmp = _M_create_node(std::forward<_Args>(__args)...);
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__tmp->_M_hook(__position._M_const_cast()._M_node);
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this->_M_inc_size(1);
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return iterator(__tmp);
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}
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#endif
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template<typename _Tp, typename _Alloc>
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typename list<_Tp, _Alloc>::iterator
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list<_Tp, _Alloc>::
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#if __cplusplus >= 201103L
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insert(const_iterator __position, const value_type& __x)
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#else
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insert(iterator __position, const value_type& __x)
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#endif
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{
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_Node* __tmp = _M_create_node(__x);
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__tmp->_M_hook(__position._M_const_cast()._M_node);
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this->_M_inc_size(1);
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return iterator(__tmp);
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}
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#if __cplusplus >= 201103L
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template<typename _Tp, typename _Alloc>
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typename list<_Tp, _Alloc>::iterator
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list<_Tp, _Alloc>::
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insert(const_iterator __position, size_type __n, const value_type& __x)
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{
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if (__n)
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{
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list __tmp(__n, __x, get_allocator());
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iterator __it = __tmp.begin();
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splice(__position, __tmp);
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return __it;
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}
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return __position._M_const_cast();
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}
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template<typename _Tp, typename _Alloc>
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template<typename _InputIterator, typename>
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typename list<_Tp, _Alloc>::iterator
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list<_Tp, _Alloc>::
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insert(const_iterator __position, _InputIterator __first,
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_InputIterator __last)
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{
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list __tmp(__first, __last, get_allocator());
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if (!__tmp.empty())
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{
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iterator __it = __tmp.begin();
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splice(__position, __tmp);
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return __it;
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}
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return __position._M_const_cast();
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}
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#endif
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template<typename _Tp, typename _Alloc>
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typename list<_Tp, _Alloc>::iterator
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list<_Tp, _Alloc>::
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#if __cplusplus >= 201103L
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erase(const_iterator __position) noexcept
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#else
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erase(iterator __position)
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#endif
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{
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iterator __ret = iterator(__position._M_node->_M_next);
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_M_erase(__position._M_const_cast());
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return __ret;
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}
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// Return a const_iterator indicating the position to start inserting or
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// erasing elements (depending whether the list is growing or shrinking),
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// and set __new_size to the number of new elements that must be appended.
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// Equivalent to the following, but performed optimally:
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// if (__new_size < size()) {
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// __new_size = 0;
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// return std::next(begin(), __new_size);
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// } else {
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// __newsize -= size();
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// return end();
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// }
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template<typename _Tp, typename _Alloc>
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typename list<_Tp, _Alloc>::const_iterator
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list<_Tp, _Alloc>::
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_M_resize_pos(size_type& __new_size) const
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{
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const_iterator __i;
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#if _GLIBCXX_USE_CXX11_ABI
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const size_type __len = size();
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if (__new_size < __len)
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{
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if (__new_size <= __len / 2)
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{
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__i = begin();
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std::advance(__i, __new_size);
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}
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else
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{
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__i = end();
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ptrdiff_t __num_erase = __len - __new_size;
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std::advance(__i, -__num_erase);
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}
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__new_size = 0;
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return __i;
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}
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else
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__i = end();
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#else
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size_type __len = 0;
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for (__i = begin(); __i != end() && __len < __new_size; ++__i, ++__len)
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;
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#endif
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__new_size -= __len;
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return __i;
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}
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#if __cplusplus >= 201103L
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template<typename _Tp, typename _Alloc>
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void
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list<_Tp, _Alloc>::
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_M_default_append(size_type __n)
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{
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size_type __i = 0;
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__try
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{
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for (; __i < __n; ++__i)
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emplace_back();
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}
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__catch(...)
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{
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for (; __i; --__i)
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pop_back();
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__throw_exception_again;
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}
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}
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template<typename _Tp, typename _Alloc>
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void
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list<_Tp, _Alloc>::
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resize(size_type __new_size)
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{
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const_iterator __i = _M_resize_pos(__new_size);
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if (__new_size)
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_M_default_append(__new_size);
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else
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erase(__i, end());
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}
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template<typename _Tp, typename _Alloc>
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void
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list<_Tp, _Alloc>::
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resize(size_type __new_size, const value_type& __x)
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{
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const_iterator __i = _M_resize_pos(__new_size);
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if (__new_size)
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insert(end(), __new_size, __x);
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else
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erase(__i, end());
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}
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#else
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template<typename _Tp, typename _Alloc>
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void
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list<_Tp, _Alloc>::
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resize(size_type __new_size, value_type __x)
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{
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const_iterator __i = _M_resize_pos(__new_size);
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if (__new_size)
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insert(end(), __new_size, __x);
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else
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erase(__i._M_const_cast(), end());
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}
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#endif
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template<typename _Tp, typename _Alloc>
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list<_Tp, _Alloc>&
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list<_Tp, _Alloc>::
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operator=(const list& __x)
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{
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if (this != std::__addressof(__x))
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{
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#if __cplusplus >= 201103L
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if (_Node_alloc_traits::_S_propagate_on_copy_assign())
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{
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auto& __this_alloc = this->_M_get_Node_allocator();
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auto& __that_alloc = __x._M_get_Node_allocator();
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if (!_Node_alloc_traits::_S_always_equal()
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&& __this_alloc != __that_alloc)
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{
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// replacement allocator cannot free existing storage
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clear();
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}
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std::__alloc_on_copy(__this_alloc, __that_alloc);
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}
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#endif
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_M_assign_dispatch(__x.begin(), __x.end(), __false_type());
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}
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return *this;
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}
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template<typename _Tp, typename _Alloc>
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void
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list<_Tp, _Alloc>::
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_M_fill_assign(size_type __n, const value_type& __val)
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{
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iterator __i = begin();
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for (; __i != end() && __n > 0; ++__i, --__n)
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*__i = __val;
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if (__n > 0)
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insert(end(), __n, __val);
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else
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erase(__i, end());
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}
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template<typename _Tp, typename _Alloc>
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template <typename _InputIterator>
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void
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list<_Tp, _Alloc>::
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_M_assign_dispatch(_InputIterator __first2, _InputIterator __last2,
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__false_type)
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{
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iterator __first1 = begin();
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iterator __last1 = end();
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for (; __first1 != __last1 && __first2 != __last2;
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++__first1, (void)++__first2)
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*__first1 = *__first2;
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if (__first2 == __last2)
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erase(__first1, __last1);
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else
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insert(__last1, __first2, __last2);
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}
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#if __cplusplus > 201703L
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# define _GLIBCXX20_ONLY(__expr) __expr
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#else
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# define _GLIBCXX20_ONLY(__expr)
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#endif
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template<typename _Tp, typename _Alloc>
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typename list<_Tp, _Alloc>::__remove_return_type
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list<_Tp, _Alloc>::
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remove(const value_type& __value)
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{
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#if !_GLIBCXX_USE_CXX11_ABI
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size_type __removed __attribute__((__unused__)) = 0;
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#endif
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list __to_destroy(get_allocator());
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iterator __first = begin();
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iterator __last = end();
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while (__first != __last)
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{
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iterator __next = __first;
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++__next;
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if (*__first == __value)
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{
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// _GLIBCXX_RESOLVE_LIB_DEFECTS
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// 526. Is it undefined if a function in the standard changes
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// in parameters?
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__to_destroy.splice(__to_destroy.begin(), *this, __first);
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#if !_GLIBCXX_USE_CXX11_ABI
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_GLIBCXX20_ONLY( __removed++ );
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#endif
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}
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__first = __next;
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}
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#if !_GLIBCXX_USE_CXX11_ABI
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return _GLIBCXX20_ONLY( __removed );
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#else
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return _GLIBCXX20_ONLY( __to_destroy.size() );
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#endif
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}
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template<typename _Tp, typename _Alloc>
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typename list<_Tp, _Alloc>::__remove_return_type
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list<_Tp, _Alloc>::
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unique()
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{
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iterator __first = begin();
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iterator __last = end();
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if (__first == __last)
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return _GLIBCXX20_ONLY( 0 );
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#if !_GLIBCXX_USE_CXX11_ABI
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size_type __removed __attribute__((__unused__)) = 0;
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#endif
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list __to_destroy(get_allocator());
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iterator __next = __first;
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while (++__next != __last)
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{
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if (*__first == *__next)
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{
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__to_destroy.splice(__to_destroy.begin(), *this, __next);
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#if !_GLIBCXX_USE_CXX11_ABI
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_GLIBCXX20_ONLY( __removed++ );
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#endif
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}
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else
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__first = __next;
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__next = __first;
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}
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#if !_GLIBCXX_USE_CXX11_ABI
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return _GLIBCXX20_ONLY( __removed );
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#else
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return _GLIBCXX20_ONLY( __to_destroy.size() );
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#endif
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}
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template<typename _Tp, typename _Alloc>
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void
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list<_Tp, _Alloc>::
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#if __cplusplus >= 201103L
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merge(list&& __x)
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#else
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merge(list& __x)
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#endif
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{
|
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// _GLIBCXX_RESOLVE_LIB_DEFECTS
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// 300. list::merge() specification incomplete
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if (this != std::__addressof(__x))
|
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{
|
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_M_check_equal_allocators(__x);
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iterator __first1 = begin();
|
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iterator __last1 = end();
|
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iterator __first2 = __x.begin();
|
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iterator __last2 = __x.end();
|
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const size_t __orig_size = __x.size();
|
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__try {
|
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while (__first1 != __last1 && __first2 != __last2)
|
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if (*__first2 < *__first1)
|
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{
|
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iterator __next = __first2;
|
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_M_transfer(__first1, __first2, ++__next);
|
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__first2 = __next;
|
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}
|
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else
|
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++__first1;
|
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if (__first2 != __last2)
|
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_M_transfer(__last1, __first2, __last2);
|
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|
|
this->_M_inc_size(__x._M_get_size());
|
|
__x._M_set_size(0);
|
|
}
|
|
__catch(...)
|
|
{
|
|
const size_t __dist = std::distance(__first2, __last2);
|
|
this->_M_inc_size(__orig_size - __dist);
|
|
__x._M_set_size(__dist);
|
|
__throw_exception_again;
|
|
}
|
|
}
|
|
}
|
|
|
|
template<typename _Tp, typename _Alloc>
|
|
template <typename _StrictWeakOrdering>
|
|
void
|
|
list<_Tp, _Alloc>::
|
|
#if __cplusplus >= 201103L
|
|
merge(list&& __x, _StrictWeakOrdering __comp)
|
|
#else
|
|
merge(list& __x, _StrictWeakOrdering __comp)
|
|
#endif
|
|
{
|
|
// _GLIBCXX_RESOLVE_LIB_DEFECTS
|
|
// 300. list::merge() specification incomplete
|
|
if (this != std::__addressof(__x))
|
|
{
|
|
_M_check_equal_allocators(__x);
|
|
|
|
iterator __first1 = begin();
|
|
iterator __last1 = end();
|
|
iterator __first2 = __x.begin();
|
|
iterator __last2 = __x.end();
|
|
const size_t __orig_size = __x.size();
|
|
__try
|
|
{
|
|
while (__first1 != __last1 && __first2 != __last2)
|
|
if (__comp(*__first2, *__first1))
|
|
{
|
|
iterator __next = __first2;
|
|
_M_transfer(__first1, __first2, ++__next);
|
|
__first2 = __next;
|
|
}
|
|
else
|
|
++__first1;
|
|
if (__first2 != __last2)
|
|
_M_transfer(__last1, __first2, __last2);
|
|
|
|
this->_M_inc_size(__x._M_get_size());
|
|
__x._M_set_size(0);
|
|
}
|
|
__catch(...)
|
|
{
|
|
const size_t __dist = std::distance(__first2, __last2);
|
|
this->_M_inc_size(__orig_size - __dist);
|
|
__x._M_set_size(__dist);
|
|
__throw_exception_again;
|
|
}
|
|
}
|
|
}
|
|
|
|
template<typename _Tp, typename _Alloc>
|
|
void
|
|
list<_Tp, _Alloc>::
|
|
sort()
|
|
{
|
|
// Do nothing if the list has length 0 or 1.
|
|
if (this->_M_impl._M_node._M_next != &this->_M_impl._M_node
|
|
&& this->_M_impl._M_node._M_next->_M_next != &this->_M_impl._M_node)
|
|
{
|
|
list __carry;
|
|
list __tmp[64];
|
|
list * __fill = __tmp;
|
|
list * __counter;
|
|
__try
|
|
{
|
|
do
|
|
{
|
|
__carry.splice(__carry.begin(), *this, begin());
|
|
|
|
for(__counter = __tmp;
|
|
__counter != __fill && !__counter->empty();
|
|
++__counter)
|
|
{
|
|
__counter->merge(__carry);
|
|
__carry.swap(*__counter);
|
|
}
|
|
__carry.swap(*__counter);
|
|
if (__counter == __fill)
|
|
++__fill;
|
|
}
|
|
while ( !empty() );
|
|
|
|
for (__counter = __tmp + 1; __counter != __fill; ++__counter)
|
|
__counter->merge(*(__counter - 1));
|
|
swap( *(__fill - 1) );
|
|
}
|
|
__catch(...)
|
|
{
|
|
this->splice(this->end(), __carry);
|
|
for (int __i = 0; __i < sizeof(__tmp)/sizeof(__tmp[0]); ++__i)
|
|
this->splice(this->end(), __tmp[__i]);
|
|
__throw_exception_again;
|
|
}
|
|
}
|
|
}
|
|
|
|
template<typename _Tp, typename _Alloc>
|
|
template <typename _Predicate>
|
|
typename list<_Tp, _Alloc>::__remove_return_type
|
|
list<_Tp, _Alloc>::
|
|
remove_if(_Predicate __pred)
|
|
{
|
|
#if !_GLIBCXX_USE_CXX11_ABI
|
|
size_type __removed __attribute__((__unused__)) = 0;
|
|
#endif
|
|
list __to_destroy(get_allocator());
|
|
iterator __first = begin();
|
|
iterator __last = end();
|
|
while (__first != __last)
|
|
{
|
|
iterator __next = __first;
|
|
++__next;
|
|
if (__pred(*__first))
|
|
{
|
|
__to_destroy.splice(__to_destroy.begin(), *this, __first);
|
|
#if !_GLIBCXX_USE_CXX11_ABI
|
|
_GLIBCXX20_ONLY( __removed++ );
|
|
#endif
|
|
}
|
|
__first = __next;
|
|
}
|
|
|
|
#if !_GLIBCXX_USE_CXX11_ABI
|
|
return _GLIBCXX20_ONLY( __removed );
|
|
#else
|
|
return _GLIBCXX20_ONLY( __to_destroy.size() );
|
|
#endif
|
|
}
|
|
|
|
template<typename _Tp, typename _Alloc>
|
|
template <typename _BinaryPredicate>
|
|
typename list<_Tp, _Alloc>::__remove_return_type
|
|
list<_Tp, _Alloc>::
|
|
unique(_BinaryPredicate __binary_pred)
|
|
{
|
|
iterator __first = begin();
|
|
iterator __last = end();
|
|
if (__first == __last)
|
|
return _GLIBCXX20_ONLY(0);
|
|
#if !_GLIBCXX_USE_CXX11_ABI
|
|
size_type __removed __attribute__((__unused__)) = 0;
|
|
#endif
|
|
list __to_destroy(get_allocator());
|
|
iterator __next = __first;
|
|
while (++__next != __last)
|
|
{
|
|
if (__binary_pred(*__first, *__next))
|
|
{
|
|
__to_destroy.splice(__to_destroy.begin(), *this, __next);
|
|
#if !_GLIBCXX_USE_CXX11_ABI
|
|
_GLIBCXX20_ONLY( __removed++ );
|
|
#endif
|
|
}
|
|
else
|
|
__first = __next;
|
|
__next = __first;
|
|
}
|
|
|
|
#if !_GLIBCXX_USE_CXX11_ABI
|
|
return _GLIBCXX20_ONLY( __removed );
|
|
#else
|
|
return _GLIBCXX20_ONLY( __to_destroy.size() );
|
|
#endif
|
|
}
|
|
|
|
#undef _GLIBCXX20_ONLY
|
|
|
|
template<typename _Tp, typename _Alloc>
|
|
template <typename _StrictWeakOrdering>
|
|
void
|
|
list<_Tp, _Alloc>::
|
|
sort(_StrictWeakOrdering __comp)
|
|
{
|
|
// Do nothing if the list has length 0 or 1.
|
|
if (this->_M_impl._M_node._M_next != &this->_M_impl._M_node
|
|
&& this->_M_impl._M_node._M_next->_M_next != &this->_M_impl._M_node)
|
|
{
|
|
list __carry;
|
|
list __tmp[64];
|
|
list * __fill = __tmp;
|
|
list * __counter;
|
|
__try
|
|
{
|
|
do
|
|
{
|
|
__carry.splice(__carry.begin(), *this, begin());
|
|
|
|
for(__counter = __tmp;
|
|
__counter != __fill && !__counter->empty();
|
|
++__counter)
|
|
{
|
|
__counter->merge(__carry, __comp);
|
|
__carry.swap(*__counter);
|
|
}
|
|
__carry.swap(*__counter);
|
|
if (__counter == __fill)
|
|
++__fill;
|
|
}
|
|
while ( !empty() );
|
|
|
|
for (__counter = __tmp + 1; __counter != __fill; ++__counter)
|
|
__counter->merge(*(__counter - 1), __comp);
|
|
swap(*(__fill - 1));
|
|
}
|
|
__catch(...)
|
|
{
|
|
this->splice(this->end(), __carry);
|
|
for (int __i = 0; __i < sizeof(__tmp)/sizeof(__tmp[0]); ++__i)
|
|
this->splice(this->end(), __tmp[__i]);
|
|
__throw_exception_again;
|
|
}
|
|
}
|
|
}
|
|
|
|
_GLIBCXX_END_NAMESPACE_CONTAINER
|
|
_GLIBCXX_END_NAMESPACE_VERSION
|
|
} // namespace std
|
|
|
|
#endif /* _LIST_TCC */
|
|
|