1301 lines
43 KiB
C++
1301 lines
43 KiB
C++
// <forward_list.h> -*- C++ -*-
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// Copyright (C) 2008, 2009, 2010 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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/** @file bits/forward_list.h
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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{forward_list}
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*/
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#ifndef _FORWARD_LIST_H
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#define _FORWARD_LIST_H 1
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#pragma GCC system_header
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#include <memory>
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#include <initializer_list>
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_GLIBCXX_BEGIN_NESTED_NAMESPACE(std, _GLIBCXX_STD_D)
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/**
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* @brief A helper basic node class for %forward_list.
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* This is just a linked list with nothing inside it.
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* There are purely list shuffling utility methods here.
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*/
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struct _Fwd_list_node_base
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{
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_Fwd_list_node_base() : _M_next(0) { }
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_Fwd_list_node_base* _M_next;
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_Fwd_list_node_base*
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_M_transfer_after(_Fwd_list_node_base* __begin)
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{
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_Fwd_list_node_base* __end = __begin;
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while (__end && __end->_M_next)
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__end = __end->_M_next;
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return _M_transfer_after(__begin, __end);
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}
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_Fwd_list_node_base*
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_M_transfer_after(_Fwd_list_node_base* __begin,
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_Fwd_list_node_base* __end)
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{
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_Fwd_list_node_base* __keep = __begin->_M_next;
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if (__end)
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{
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__begin->_M_next = __end->_M_next;
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__end->_M_next = _M_next;
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}
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else
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__begin->_M_next = 0;
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_M_next = __keep;
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return __end;
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}
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void
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_M_reverse_after()
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{
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_Fwd_list_node_base* __tail = _M_next;
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if (!__tail)
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return;
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while (_Fwd_list_node_base* __temp = __tail->_M_next)
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{
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_Fwd_list_node_base* __keep = _M_next;
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_M_next = __temp;
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__tail->_M_next = __temp->_M_next;
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_M_next->_M_next = __keep;
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}
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}
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};
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/**
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* @brief A helper node class for %forward_list.
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* This is just a linked list with a data value in each node.
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* There is a sorting utility method.
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*/
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template<typename _Tp>
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struct _Fwd_list_node
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: public _Fwd_list_node_base
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{
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template<typename... _Args>
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_Fwd_list_node(_Args&&... __args)
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: _Fwd_list_node_base(),
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_M_value(std::forward<_Args>(__args)...) { }
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_Tp _M_value;
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};
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/**
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* @brief A forward_list::iterator.
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*
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* All the functions are op overloads.
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*/
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template<typename _Tp>
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struct _Fwd_list_iterator
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{
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typedef _Fwd_list_iterator<_Tp> _Self;
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typedef _Fwd_list_node<_Tp> _Node;
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typedef _Tp value_type;
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typedef _Tp* pointer;
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typedef _Tp& reference;
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typedef ptrdiff_t difference_type;
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typedef std::forward_iterator_tag iterator_category;
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_Fwd_list_iterator()
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: _M_node() { }
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explicit
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_Fwd_list_iterator(_Fwd_list_node_base* __n)
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: _M_node(__n) { }
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reference
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operator*() const
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{ return static_cast<_Node*>(this->_M_node)->_M_value; }
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pointer
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operator->() const
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{ return std::__addressof(static_cast<_Node*>
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(this->_M_node)->_M_value); }
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_Self&
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operator++()
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{
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_M_node = _M_node->_M_next;
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return *this;
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}
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_Self
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operator++(int)
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{
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_Self __tmp(*this);
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_M_node = _M_node->_M_next;
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return __tmp;
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}
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bool
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operator==(const _Self& __x) const
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{ return _M_node == __x._M_node; }
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bool
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operator!=(const _Self& __x) const
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{ return _M_node != __x._M_node; }
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_Self
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_M_next() const
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{
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if (_M_node)
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return _Fwd_list_iterator(_M_node->_M_next);
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else
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return _Fwd_list_iterator(0);
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}
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_Fwd_list_node_base* _M_node;
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};
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/**
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* @brief A forward_list::const_iterator.
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*
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* All the functions are op overloads.
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*/
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template<typename _Tp>
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struct _Fwd_list_const_iterator
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{
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typedef _Fwd_list_const_iterator<_Tp> _Self;
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typedef const _Fwd_list_node<_Tp> _Node;
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typedef _Fwd_list_iterator<_Tp> iterator;
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typedef _Tp value_type;
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typedef const _Tp* pointer;
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typedef const _Tp& reference;
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typedef ptrdiff_t difference_type;
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typedef std::forward_iterator_tag iterator_category;
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_Fwd_list_const_iterator()
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: _M_node() { }
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explicit
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_Fwd_list_const_iterator(const _Fwd_list_node_base* __n)
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: _M_node(__n) { }
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_Fwd_list_const_iterator(const iterator& __iter)
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: _M_node(__iter._M_node) { }
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reference
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operator*() const
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{ return static_cast<_Node*>(this->_M_node)->_M_value; }
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pointer
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operator->() const
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{ return std::__addressof(static_cast<_Node*>
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(this->_M_node)->_M_value); }
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_Self&
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operator++()
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{
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_M_node = _M_node->_M_next;
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return *this;
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}
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_Self
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operator++(int)
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{
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_Self __tmp(*this);
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_M_node = _M_node->_M_next;
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return __tmp;
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}
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bool
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operator==(const _Self& __x) const
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{ return _M_node == __x._M_node; }
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bool
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operator!=(const _Self& __x) const
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{ return _M_node != __x._M_node; }
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_Self
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_M_next() const
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{
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if (this->_M_node)
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return _Fwd_list_const_iterator(_M_node->_M_next);
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else
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return _Fwd_list_const_iterator(0);
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}
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const _Fwd_list_node_base* _M_node;
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};
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/**
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* @brief Forward list iterator equality comparison.
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*/
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template<typename _Tp>
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inline bool
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operator==(const _Fwd_list_iterator<_Tp>& __x,
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const _Fwd_list_const_iterator<_Tp>& __y)
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{ return __x._M_node == __y._M_node; }
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/**
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* @brief Forward list iterator inequality comparison.
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*/
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template<typename _Tp>
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inline bool
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operator!=(const _Fwd_list_iterator<_Tp>& __x,
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const _Fwd_list_const_iterator<_Tp>& __y)
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{ return __x._M_node != __y._M_node; }
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/**
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* @brief Base class for %forward_list.
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*/
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template<typename _Tp, typename _Alloc>
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struct _Fwd_list_base
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{
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protected:
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typedef typename _Alloc::template rebind<_Tp>::other _Tp_alloc_type;
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typedef typename _Alloc::template
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rebind<_Fwd_list_node<_Tp>>::other _Node_alloc_type;
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struct _Fwd_list_impl
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: public _Node_alloc_type
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{
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_Fwd_list_node_base _M_head;
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_Fwd_list_impl()
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: _Node_alloc_type(), _M_head()
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{ }
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_Fwd_list_impl(const _Node_alloc_type& __a)
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: _Node_alloc_type(__a), _M_head()
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{ }
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};
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_Fwd_list_impl _M_impl;
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public:
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typedef _Fwd_list_iterator<_Tp> iterator;
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typedef _Fwd_list_const_iterator<_Tp> const_iterator;
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typedef _Fwd_list_node<_Tp> _Node;
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_Node_alloc_type&
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_M_get_Node_allocator()
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{ return *static_cast<_Node_alloc_type*>(&this->_M_impl); }
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const _Node_alloc_type&
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_M_get_Node_allocator() const
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{ return *static_cast<const _Node_alloc_type*>(&this->_M_impl); }
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_Fwd_list_base()
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: _M_impl() { }
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_Fwd_list_base(const _Alloc& __a)
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: _M_impl(__a) { }
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_Fwd_list_base(const _Fwd_list_base& __lst, const _Alloc& __a);
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_Fwd_list_base(_Fwd_list_base&& __lst, const _Alloc& __a)
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: _M_impl(__a)
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{
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this->_M_impl._M_head._M_next = __lst._M_impl._M_head._M_next;
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__lst._M_impl._M_head._M_next = 0;
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}
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_Fwd_list_base(_Fwd_list_base&& __lst)
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: _M_impl(__lst._M_get_Node_allocator())
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{
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this->_M_impl._M_head._M_next = __lst._M_impl._M_head._M_next;
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__lst._M_impl._M_head._M_next = 0;
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}
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~_Fwd_list_base()
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{ _M_erase_after(&_M_impl._M_head, 0); }
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protected:
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_Node*
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_M_get_node()
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{ return _M_get_Node_allocator().allocate(1); }
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template<typename... _Args>
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_Node*
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_M_create_node(_Args&&... __args)
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{
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_Node* __node = this->_M_get_node();
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__try
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{
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_M_get_Node_allocator().construct(__node,
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std::forward<_Args>(__args)...);
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__node->_M_next = 0;
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}
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__catch(...)
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{
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this->_M_put_node(__node);
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__throw_exception_again;
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}
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return __node;
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}
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template<typename... _Args>
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_Fwd_list_node_base*
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_M_insert_after(const_iterator __pos, _Args&&... __args);
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void
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_M_put_node(_Node* __p)
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{ _M_get_Node_allocator().deallocate(__p, 1); }
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_Fwd_list_node_base*
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_M_erase_after(_Fwd_list_node_base* __pos);
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_Fwd_list_node_base*
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_M_erase_after(_Fwd_list_node_base* __pos,
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_Fwd_list_node_base* __last);
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};
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/**
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* @brief A standard container with linear time access to elements,
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* and fixed time insertion/deletion at any point in the sequence.
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*
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* @ingroup sequences
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*
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* Meets the requirements of a <a href="tables.html#65">container</a>, a
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* <a href="tables.html#67">sequence</a>, including the
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* <a href="tables.html#68">optional sequence requirements</a> with the
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* %exception of @c at and @c operator[].
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*
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* This is a @e singly @e linked %list. Traversal up the
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* %list requires linear time, but adding and removing elements (or
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* @e nodes) is done in constant time, regardless of where the
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* change takes place. Unlike std::vector and std::deque,
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* random-access iterators are not provided, so subscripting ( @c
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* [] ) access is not allowed. For algorithms which only need
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* sequential access, this lack makes no difference.
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*
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* Also unlike the other standard containers, std::forward_list provides
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* specialized algorithms %unique to linked lists, such as
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* splicing, sorting, and in-place reversal.
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*
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* A couple points on memory allocation for forward_list<Tp>:
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*
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* First, we never actually allocate a Tp, we allocate
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* Fwd_list_node<Tp>'s and trust [20.1.5]/4 to DTRT. This is to ensure
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* that after elements from %forward_list<X,Alloc1> are spliced into
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* %forward_list<X,Alloc2>, destroying the memory of the second %list is a
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* valid operation, i.e., Alloc1 giveth and Alloc2 taketh away.
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*/
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template<typename _Tp, typename _Alloc = allocator<_Tp> >
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class forward_list : private _Fwd_list_base<_Tp, _Alloc>
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{
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private:
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typedef _Fwd_list_base<_Tp, _Alloc> _Base;
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typedef _Fwd_list_node<_Tp> _Node;
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typedef _Fwd_list_node_base _Node_base;
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typedef typename _Base::_Tp_alloc_type _Tp_alloc_type;
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public:
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// types:
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typedef _Tp value_type;
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typedef typename _Tp_alloc_type::pointer pointer;
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typedef typename _Tp_alloc_type::const_pointer const_pointer;
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typedef typename _Tp_alloc_type::reference reference;
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typedef typename _Tp_alloc_type::const_reference const_reference;
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typedef _Fwd_list_iterator<_Tp> iterator;
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typedef _Fwd_list_const_iterator<_Tp> const_iterator;
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typedef std::size_t size_type;
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typedef std::ptrdiff_t difference_type;
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typedef _Alloc allocator_type;
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// 23.2.3.1 construct/copy/destroy:
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/**
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* @brief Creates a %forward_list with no elements.
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* @param al An allocator object.
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*/
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explicit
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forward_list(const _Alloc& __al = _Alloc())
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: _Base(__al)
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{ }
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/**
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* @brief Copy constructor with allocator argument.
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* @param list Input list to copy.
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* @param al An allocator object.
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*/
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forward_list(const forward_list& __list, const _Alloc& __al)
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: _Base(__list, __al)
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{ }
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/**
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* @brief Move constructor with allocator argument.
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* @param list Input list to move.
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* @param al An allocator object.
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*/
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forward_list(forward_list&& __list, const _Alloc& __al)
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: _Base(std::move(__list), __al)
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{ }
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/**
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* @brief Creates a %forward_list with default constructed elements.
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* @param n The number of elements to initially create.
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*
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* This constructor creates the %forward_list with @a n default
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* constructed elements.
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*/
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explicit
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forward_list(size_type __n)
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: _Base()
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{ _M_default_initialize(__n); }
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/**
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* @brief Creates a %forward_list with copies of an exemplar element.
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* @param n The number of elements to initially create.
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* @param value An element to copy.
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* @param al An allocator object.
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*
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* This constructor fills the %forward_list with @a n copies of @a
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* value.
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*/
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forward_list(size_type __n, const _Tp& __value,
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const _Alloc& __al = _Alloc())
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: _Base(__al)
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{ _M_fill_initialize(__n, __value); }
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/**
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* @brief Builds a %forward_list from a range.
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* @param first An input iterator.
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* @param last An input iterator.
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* @param al An allocator object.
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*
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* Create a %forward_list consisting of copies of the elements from
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* [@a first,@a last). This is linear in N (where N is
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* distance(@a first,@a last)).
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*/
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template<typename _InputIterator>
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forward_list(_InputIterator __first, _InputIterator __last,
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const _Alloc& __al = _Alloc())
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: _Base(__al)
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{
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// Check whether it's an integral type. If so, it's not an iterator.
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typedef typename std::__is_integer<_InputIterator>::__type _Integral;
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_M_initialize_dispatch(__first, __last, _Integral());
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}
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/**
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* @brief The %forward_list copy constructor.
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* @param list A %forward_list of identical element and allocator
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* types.
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*
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* The newly-created %forward_list uses a copy of the allocation
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* object used by @a list.
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*/
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forward_list(const forward_list& __list)
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: _Base(__list._M_get_Node_allocator())
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{ _M_initialize_dispatch(__list.begin(), __list.end(), __false_type()); }
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/**
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* @brief The %forward_list move constructor.
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* @param list A %forward_list of identical element and allocator
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* types.
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*
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* The newly-created %forward_list contains the exact contents of @a
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* forward_list. The contents of @a list are a valid, but unspecified
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* %forward_list.
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*/
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forward_list(forward_list&& __list)
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: _Base(std::move(__list)) { }
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/**
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* @brief Builds a %forward_list from an initializer_list
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* @param il An initializer_list of value_type.
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* @param al An allocator object.
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*
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|
* Create a %forward_list consisting of copies of the elements
|
|
* in the initializer_list @a il. This is linear in il.size().
|
|
*/
|
|
forward_list(std::initializer_list<_Tp> __il,
|
|
const _Alloc& __al = _Alloc())
|
|
: _Base(__al)
|
|
{ _M_initialize_dispatch(__il.begin(), __il.end(), __false_type()); }
|
|
|
|
/**
|
|
* @brief The forward_list dtor.
|
|
*/
|
|
~forward_list()
|
|
{ }
|
|
|
|
/**
|
|
* @brief The %forward_list assignment operator.
|
|
* @param list A %forward_list of identical element and allocator
|
|
* types.
|
|
*
|
|
* All the elements of @a list are copied, but unlike the copy
|
|
* constructor, the allocator object is not copied.
|
|
*/
|
|
forward_list&
|
|
operator=(const forward_list& __list);
|
|
|
|
/**
|
|
* @brief The %forward_list move assignment operator.
|
|
* @param list A %forward_list of identical element and allocator
|
|
* types.
|
|
*
|
|
* The contents of @a list are moved into this %forward_list
|
|
* (without copying). @a list is a valid, but unspecified
|
|
* %forward_list
|
|
*/
|
|
forward_list&
|
|
operator=(forward_list&& __list)
|
|
{
|
|
// NB: DR 1204.
|
|
// NB: DR 675.
|
|
this->clear();
|
|
this->swap(__list);
|
|
return *this;
|
|
}
|
|
|
|
/**
|
|
* @brief The %forward_list initializer list assignment operator.
|
|
* @param il An initializer_list of value_type.
|
|
*
|
|
* Replace the contents of the %forward_list with copies of the
|
|
* elements in the initializer_list @a il. This is linear in
|
|
* il.size().
|
|
*/
|
|
forward_list&
|
|
operator=(std::initializer_list<_Tp> __il)
|
|
{
|
|
assign(__il);
|
|
return *this;
|
|
}
|
|
|
|
/**
|
|
* @brief Assigns a range to a %forward_list.
|
|
* @param first An input iterator.
|
|
* @param last An input iterator.
|
|
*
|
|
* This function fills a %forward_list with copies of the elements
|
|
* in the range [@a first,@a last).
|
|
*
|
|
* Note that the assignment completely changes the %forward_list and
|
|
* that the resulting %forward_list's size is the same as the number
|
|
* of elements assigned. Old data may be lost.
|
|
*/
|
|
template<typename _InputIterator>
|
|
void
|
|
assign(_InputIterator __first, _InputIterator __last)
|
|
{
|
|
clear();
|
|
insert_after(cbefore_begin(), __first, __last);
|
|
}
|
|
|
|
/**
|
|
* @brief Assigns a given value to a %forward_list.
|
|
* @param n Number of elements to be assigned.
|
|
* @param val Value to be assigned.
|
|
*
|
|
* This function fills a %forward_list with @a n copies of the given
|
|
* value. Note that the assignment completely changes the
|
|
* %forward_list and that the resulting %forward_list's size is the
|
|
* same as the number of elements assigned. Old data may be lost.
|
|
*/
|
|
void
|
|
assign(size_type __n, const _Tp& __val)
|
|
{
|
|
clear();
|
|
insert_after(cbefore_begin(), __n, __val);
|
|
}
|
|
|
|
/**
|
|
* @brief Assigns an initializer_list to a %forward_list.
|
|
* @param il An initializer_list of value_type.
|
|
*
|
|
* Replace the contents of the %forward_list with copies of the
|
|
* elements in the initializer_list @a il. This is linear in
|
|
* il.size().
|
|
*/
|
|
void
|
|
assign(std::initializer_list<_Tp> __il)
|
|
{
|
|
clear();
|
|
insert_after(cbefore_begin(), __il);
|
|
}
|
|
|
|
/// Get a copy of the memory allocation object.
|
|
allocator_type
|
|
get_allocator() const
|
|
{ return this->_M_get_Node_allocator(); }
|
|
|
|
// 23.2.3.2 iterators:
|
|
|
|
/**
|
|
* Returns a read/write iterator that points before the first element
|
|
* in the %forward_list. Iteration is done in ordinary element order.
|
|
*/
|
|
iterator
|
|
before_begin()
|
|
{ return iterator(&this->_M_impl._M_head); }
|
|
|
|
/**
|
|
* Returns a read-only (constant) iterator that points before the
|
|
* first element in the %forward_list. Iteration is done in ordinary
|
|
* element order.
|
|
*/
|
|
const_iterator
|
|
before_begin() const
|
|
{ return const_iterator(&this->_M_impl._M_head); }
|
|
|
|
/**
|
|
* Returns a read/write iterator that points to the first element
|
|
* in the %forward_list. Iteration is done in ordinary element order.
|
|
*/
|
|
iterator
|
|
begin()
|
|
{ return iterator(this->_M_impl._M_head._M_next); }
|
|
|
|
/**
|
|
* Returns a read-only (constant) iterator that points to the first
|
|
* element in the %forward_list. Iteration is done in ordinary
|
|
* element order.
|
|
*/
|
|
const_iterator
|
|
begin() const
|
|
{ return const_iterator(this->_M_impl._M_head._M_next); }
|
|
|
|
/**
|
|
* Returns a read/write iterator that points one past the last
|
|
* element in the %forward_list. Iteration is done in ordinary
|
|
* element order.
|
|
*/
|
|
iterator
|
|
end()
|
|
{ return iterator(0); }
|
|
|
|
/**
|
|
* Returns a read-only iterator that points one past the last
|
|
* element in the %forward_list. Iteration is done in ordinary
|
|
* element order.
|
|
*/
|
|
const_iterator
|
|
end() const
|
|
{ return const_iterator(0); }
|
|
|
|
/**
|
|
* Returns a read-only (constant) iterator that points to the
|
|
* first element in the %forward_list. Iteration is done in ordinary
|
|
* element order.
|
|
*/
|
|
const_iterator
|
|
cbegin() const
|
|
{ return const_iterator(this->_M_impl._M_head._M_next); }
|
|
|
|
/**
|
|
* Returns a read-only (constant) iterator that points before the
|
|
* first element in the %forward_list. Iteration is done in ordinary
|
|
* element order.
|
|
*/
|
|
const_iterator
|
|
cbefore_begin() const
|
|
{ return const_iterator(&this->_M_impl._M_head); }
|
|
|
|
/**
|
|
* Returns a read-only (constant) iterator that points one past
|
|
* the last element in the %forward_list. Iteration is done in
|
|
* ordinary element order.
|
|
*/
|
|
const_iterator
|
|
cend() const
|
|
{ return const_iterator(0); }
|
|
|
|
/**
|
|
* Returns true if the %forward_list is empty. (Thus begin() would
|
|
* equal end().)
|
|
*/
|
|
bool
|
|
empty() const
|
|
{ return this->_M_impl._M_head._M_next == 0; }
|
|
|
|
/**
|
|
* Returns the largest possible size of %forward_list.
|
|
*/
|
|
size_type
|
|
max_size() const
|
|
{ return this->_M_get_Node_allocator().max_size(); }
|
|
|
|
// 23.2.3.3 element access:
|
|
|
|
/**
|
|
* Returns a read/write reference to the data at the first
|
|
* element of the %forward_list.
|
|
*/
|
|
reference
|
|
front()
|
|
{
|
|
_Node* __front = static_cast<_Node*>(this->_M_impl._M_head._M_next);
|
|
return __front->_M_value;
|
|
}
|
|
|
|
/**
|
|
* Returns a read-only (constant) reference to the data at the first
|
|
* element of the %forward_list.
|
|
*/
|
|
const_reference
|
|
front() const
|
|
{
|
|
_Node* __front = static_cast<_Node*>(this->_M_impl._M_head._M_next);
|
|
return __front->_M_value;
|
|
}
|
|
|
|
// 23.2.3.4 modifiers:
|
|
|
|
/**
|
|
* @brief Constructs object in %forward_list at the front of the
|
|
* list.
|
|
* @param args Arguments.
|
|
*
|
|
* This function will insert an object of type Tp constructed
|
|
* with Tp(std::forward<Args>(args)...) at the front of the list
|
|
* Due to the nature of a %forward_list this operation can
|
|
* be done in constant time, and does not invalidate iterators
|
|
* and references.
|
|
*/
|
|
template<typename... _Args>
|
|
void
|
|
emplace_front(_Args&&... __args)
|
|
{ this->_M_insert_after(cbefore_begin(),
|
|
std::forward<_Args>(__args)...); }
|
|
|
|
/**
|
|
* @brief Add data to the front of the %forward_list.
|
|
* @param val Data to be added.
|
|
*
|
|
* This is a typical stack operation. The function creates an
|
|
* element at the front of the %forward_list and assigns the given
|
|
* data to it. Due to the nature of a %forward_list this operation
|
|
* can be done in constant time, and does not invalidate iterators
|
|
* and references.
|
|
*/
|
|
void
|
|
push_front(const _Tp& __val)
|
|
{ this->_M_insert_after(cbefore_begin(), __val); }
|
|
|
|
/**
|
|
*
|
|
*/
|
|
void
|
|
push_front(_Tp&& __val)
|
|
{ this->_M_insert_after(cbefore_begin(), std::move(__val)); }
|
|
|
|
/**
|
|
* @brief Removes first element.
|
|
*
|
|
* This is a typical stack operation. It shrinks the %forward_list
|
|
* by one. Due to the nature of a %forward_list this operation can
|
|
* be done in constant time, and only invalidates iterators/references
|
|
* to the element being removed.
|
|
*
|
|
* Note that no data is returned, and if the first element's data
|
|
* is needed, it should be retrieved before pop_front() is
|
|
* called.
|
|
*/
|
|
void
|
|
pop_front()
|
|
{ this->_M_erase_after(&this->_M_impl._M_head); }
|
|
|
|
/**
|
|
* @brief Constructs object in %forward_list after the specified
|
|
* iterator.
|
|
* @param pos A const_iterator into the %forward_list.
|
|
* @param args Arguments.
|
|
* @return An iterator that points to the inserted data.
|
|
*
|
|
* This function will insert an object of type T constructed
|
|
* with T(std::forward<Args>(args)...) after the specified
|
|
* location. Due to the nature of a %forward_list this operation can
|
|
* be done in constant time, and does not invalidate iterators
|
|
* and references.
|
|
*/
|
|
template<typename... _Args>
|
|
iterator
|
|
emplace_after(const_iterator __pos, _Args&&... __args)
|
|
{ return iterator(this->_M_insert_after(__pos,
|
|
std::forward<_Args>(__args)...)); }
|
|
|
|
/**
|
|
* @brief Inserts given value into %forward_list after specified
|
|
* iterator.
|
|
* @param pos An iterator into the %forward_list.
|
|
* @param val Data to be inserted.
|
|
* @return An iterator that points to the inserted data.
|
|
*
|
|
* This function will insert a copy of the given value after
|
|
* the specified location. Due to the nature of a %forward_list this
|
|
* operation can be done in constant time, and does not
|
|
* invalidate iterators and references.
|
|
*/
|
|
iterator
|
|
insert_after(const_iterator __pos, const _Tp& __val)
|
|
{ return iterator(this->_M_insert_after(__pos, __val)); }
|
|
|
|
/**
|
|
*
|
|
*/
|
|
iterator
|
|
insert_after(const_iterator __pos, _Tp&& __val)
|
|
{ return iterator(this->_M_insert_after(__pos, std::move(__val))); }
|
|
|
|
/**
|
|
* @brief Inserts a number of copies of given data into the
|
|
* %forward_list.
|
|
* @param pos An iterator into the %forward_list.
|
|
* @param n Number of elements to be inserted.
|
|
* @param val Data to be inserted.
|
|
* @return An iterator pointing to the last inserted copy of
|
|
* @a val or @a pos if @a n == 0.
|
|
*
|
|
* This function will insert a specified number of copies of the
|
|
* given data after the location specified by @a pos.
|
|
*
|
|
* This operation is linear in the number of elements inserted and
|
|
* does not invalidate iterators and references.
|
|
*/
|
|
iterator
|
|
insert_after(const_iterator __pos, size_type __n, const _Tp& __val);
|
|
|
|
/**
|
|
* @brief Inserts a range into the %forward_list.
|
|
* @param position An iterator into the %forward_list.
|
|
* @param first An input iterator.
|
|
* @param last An input iterator.
|
|
* @return An iterator pointing to the last inserted element or
|
|
* @a pos if @a first == @a last.
|
|
*
|
|
* This function will insert copies of the data in the range [@a
|
|
* first,@a last) into the %forward_list after the location specified
|
|
* by @a pos.
|
|
*
|
|
* This operation is linear in the number of elements inserted and
|
|
* does not invalidate iterators and references.
|
|
*/
|
|
template<typename _InputIterator>
|
|
iterator
|
|
insert_after(const_iterator __pos,
|
|
_InputIterator __first, _InputIterator __last);
|
|
|
|
/**
|
|
* @brief Inserts the contents of an initializer_list into
|
|
* %forward_list after the specified iterator.
|
|
* @param pos An iterator into the %forward_list.
|
|
* @param il An initializer_list of value_type.
|
|
* @return An iterator pointing to the last inserted element
|
|
* or @a pos if @a il is empty.
|
|
*
|
|
* This function will insert copies of the data in the
|
|
* initializer_list @a il into the %forward_list before the location
|
|
* specified by @a pos.
|
|
*
|
|
* This operation is linear in the number of elements inserted and
|
|
* does not invalidate iterators and references.
|
|
*/
|
|
iterator
|
|
insert_after(const_iterator __pos, std::initializer_list<_Tp> __il);
|
|
|
|
/**
|
|
* @brief Removes the element pointed to by the iterator following
|
|
* @c pos.
|
|
* @param pos Iterator pointing before element to be erased.
|
|
* @return An iterator pointing to the element following the one
|
|
* that was erased, or end() if no such element exists.
|
|
*
|
|
* This function will erase the element at the given position and
|
|
* thus shorten the %forward_list by one.
|
|
*
|
|
* Due to the nature of a %forward_list this operation can be done
|
|
* in constant time, and only invalidates iterators/references to
|
|
* the element being removed. The user is also cautioned that
|
|
* this function only erases the element, and that if the element
|
|
* is itself a pointer, the pointed-to memory is not touched in
|
|
* any way. Managing the pointer is the user's responsibility.
|
|
*/
|
|
iterator
|
|
erase_after(const_iterator __pos)
|
|
{ return iterator(this->_M_erase_after(const_cast<_Node_base*>
|
|
(__pos._M_node))); }
|
|
|
|
/**
|
|
* @brief Remove a range of elements.
|
|
* @param pos Iterator pointing before the first element to be
|
|
* erased.
|
|
* @param last Iterator pointing to one past the last element to be
|
|
* erased.
|
|
* @return @last.
|
|
*
|
|
* This function will erase the elements in the range @a
|
|
* (pos,last) and shorten the %forward_list accordingly.
|
|
*
|
|
* This operation is linear time in the size of the range and only
|
|
* invalidates iterators/references to the element being removed.
|
|
* The user is also cautioned that this function only erases the
|
|
* elements, and that if the elements themselves are pointers, the
|
|
* pointed-to memory is not touched in any way. Managing the pointer
|
|
* is the user's responsibility.
|
|
*/
|
|
iterator
|
|
erase_after(const_iterator __pos, const_iterator __last)
|
|
{ return iterator(this->_M_erase_after(const_cast<_Node_base*>
|
|
(__pos._M_node),
|
|
const_cast<_Node_base*>
|
|
(__last._M_node))); }
|
|
|
|
/**
|
|
* @brief Swaps data with another %forward_list.
|
|
* @param list A %forward_list of the same element and allocator
|
|
* types.
|
|
*
|
|
* This exchanges the elements between two lists in constant
|
|
* time. Note that the global std::swap() function is
|
|
* specialized such that std::swap(l1,l2) will feed to this
|
|
* function.
|
|
*/
|
|
void
|
|
swap(forward_list& __list)
|
|
{ std::swap(this->_M_impl._M_head._M_next,
|
|
__list._M_impl._M_head._M_next); }
|
|
|
|
/**
|
|
* @brief Resizes the %forward_list to the specified number of
|
|
* elements.
|
|
* @param sz Number of elements the %forward_list should contain.
|
|
*
|
|
* This function will %resize the %forward_list to the specified
|
|
* number of elements. If the number is smaller than the
|
|
* %forward_list's current size the %forward_list is truncated,
|
|
* otherwise the %forward_list is extended and the new elements
|
|
* are default constructed.
|
|
*/
|
|
void
|
|
resize(size_type __sz);
|
|
|
|
/**
|
|
* @brief Resizes the %forward_list to the specified number of
|
|
* elements.
|
|
* @param sz Number of elements the %forward_list should contain.
|
|
* @param val Data with which new elements should be populated.
|
|
*
|
|
* This function will %resize the %forward_list to the specified
|
|
* number of elements. If the number is smaller than the
|
|
* %forward_list's current size the %forward_list is truncated,
|
|
* otherwise the %forward_list is extended and new elements are
|
|
* populated with given data.
|
|
*/
|
|
void
|
|
resize(size_type __sz, const value_type& __val);
|
|
|
|
/**
|
|
* @brief Erases all the elements.
|
|
*
|
|
* Note that this function only erases
|
|
* the elements, and that if the elements themselves are
|
|
* pointers, the pointed-to memory is not touched in any way.
|
|
* Managing the pointer is the user's responsibility.
|
|
*/
|
|
void
|
|
clear()
|
|
{ this->_M_erase_after(&this->_M_impl._M_head, 0); }
|
|
|
|
// 23.2.3.5 forward_list operations:
|
|
|
|
/**
|
|
* @brief Insert contents of another %forward_list.
|
|
* @param pos Iterator referencing the element to insert after.
|
|
* @param list Source list.
|
|
*
|
|
* The elements of @a list are inserted in constant time after
|
|
* the element referenced by @a pos. @a list becomes an empty
|
|
* list.
|
|
*
|
|
* Requires this != @a x.
|
|
*/
|
|
void
|
|
splice_after(const_iterator __pos, forward_list&& __list)
|
|
{
|
|
if (!__list.empty())
|
|
_M_splice_after(__pos, std::move(__list));
|
|
}
|
|
|
|
/**
|
|
* @brief Insert element from another %forward_list.
|
|
* @param pos Iterator referencing the element to insert after.
|
|
* @param list Source list.
|
|
* @param i Iterator referencing the element before the element
|
|
* to move.
|
|
*
|
|
* Removes the element in list @a list referenced by @a i and
|
|
* inserts it into the current list after @a pos.
|
|
*/
|
|
void
|
|
splice_after(const_iterator __pos, forward_list&& __list,
|
|
const_iterator __i)
|
|
{
|
|
const_iterator __j = __i;
|
|
++__j;
|
|
if (__pos == __i || __pos == __j)
|
|
return;
|
|
|
|
splice_after(__pos, std::move(__list), __i, __j);
|
|
}
|
|
|
|
/**
|
|
* @brief Insert range from another %forward_list.
|
|
* @param pos Iterator referencing the element to insert after.
|
|
* @param list Source list.
|
|
* @param before Iterator referencing before the start of range
|
|
* in list.
|
|
* @param last Iterator referencing the end of range in list.
|
|
*
|
|
* Removes elements in the range (before,last) and inserts them
|
|
* after @a pos in constant time.
|
|
*
|
|
* Undefined if @a pos is in (before,last).
|
|
*/
|
|
void
|
|
splice_after(const_iterator __pos, forward_list&& __list,
|
|
const_iterator __before, const_iterator __last);
|
|
|
|
/**
|
|
* @brief Remove all elements equal to value.
|
|
* @param val The value to remove.
|
|
*
|
|
* Removes every element in the list equal to @a value.
|
|
* Remaining elements stay in list order. Note that this
|
|
* function only erases the elements, and that if the elements
|
|
* themselves are pointers, the pointed-to memory is not
|
|
* touched in any way. Managing the pointer is the user's
|
|
* responsibility.
|
|
*/
|
|
void
|
|
remove(const _Tp& __val);
|
|
|
|
/**
|
|
* @brief Remove all elements satisfying a predicate.
|
|
* @param pred Unary predicate function or object.
|
|
*
|
|
* Removes every element in the list for which the predicate
|
|
* returns true. Remaining elements stay in list order. Note
|
|
* that this function only erases the elements, and that if the
|
|
* elements themselves are pointers, the pointed-to memory is
|
|
* not touched in any way. Managing the pointer is the user's
|
|
* responsibility.
|
|
*/
|
|
template<typename _Pred>
|
|
void
|
|
remove_if(_Pred __pred);
|
|
|
|
/**
|
|
* @brief Remove consecutive duplicate elements.
|
|
*
|
|
* For each consecutive set of elements with the same value,
|
|
* remove all but the first one. Remaining elements stay in
|
|
* list order. Note that this function only erases the
|
|
* elements, and that if the elements themselves are pointers,
|
|
* the pointed-to memory is not touched in any way. Managing
|
|
* the pointer is the user's responsibility.
|
|
*/
|
|
void
|
|
unique()
|
|
{ this->unique(std::equal_to<_Tp>()); }
|
|
|
|
/**
|
|
* @brief Remove consecutive elements satisfying a predicate.
|
|
* @param binary_pred Binary predicate function or object.
|
|
*
|
|
* For each consecutive set of elements [first,last) that
|
|
* satisfy predicate(first,i) where i is an iterator in
|
|
* [first,last), remove all but the first one. Remaining
|
|
* elements stay in list order. Note that this function only
|
|
* erases the elements, and that if the elements themselves are
|
|
* pointers, the pointed-to memory is not touched in any way.
|
|
* Managing the pointer is the user's responsibility.
|
|
*/
|
|
template<typename _BinPred>
|
|
void
|
|
unique(_BinPred __binary_pred);
|
|
|
|
/**
|
|
* @brief Merge sorted lists.
|
|
* @param list Sorted list to merge.
|
|
*
|
|
* Assumes that both @a list and this list are sorted according to
|
|
* operator<(). Merges elements of @a list into this list in
|
|
* sorted order, leaving @a list empty when complete. Elements in
|
|
* this list precede elements in @a list that are equal.
|
|
*/
|
|
void
|
|
merge(forward_list&& __list)
|
|
{ this->merge(std::move(__list), std::less<_Tp>()); }
|
|
|
|
/**
|
|
* @brief Merge sorted lists according to comparison function.
|
|
* @param list Sorted list to merge.
|
|
* @param comp Comparison function defining sort order.
|
|
*
|
|
* Assumes that both @a list and this list are sorted according to
|
|
* comp. Merges elements of @a list into this list
|
|
* in sorted order, leaving @a list empty when complete. Elements
|
|
* in this list precede elements in @a list that are equivalent
|
|
* according to comp().
|
|
*/
|
|
template<typename _Comp>
|
|
void
|
|
merge(forward_list&& __list, _Comp __comp);
|
|
|
|
/**
|
|
* @brief Sort the elements of the list.
|
|
*
|
|
* Sorts the elements of this list in NlogN time. Equivalent
|
|
* elements remain in list order.
|
|
*/
|
|
void
|
|
sort()
|
|
{ this->sort(std::less<_Tp>()); }
|
|
|
|
/**
|
|
* @brief Sort the forward_list using a comparison function.
|
|
*
|
|
* Sorts the elements of this list in NlogN time. Equivalent
|
|
* elements remain in list order.
|
|
*/
|
|
template<typename _Comp>
|
|
void
|
|
sort(_Comp __comp);
|
|
|
|
/**
|
|
* @brief Reverse the elements in list.
|
|
*
|
|
* Reverse the order of elements in the list in linear time.
|
|
*/
|
|
void
|
|
reverse()
|
|
{ this->_M_impl._M_head._M_reverse_after(); }
|
|
|
|
private:
|
|
template<typename _Integer>
|
|
void
|
|
_M_initialize_dispatch(_Integer __n, _Integer __x, __true_type)
|
|
{ _M_fill_initialize(static_cast<size_type>(__n), __x); }
|
|
|
|
// Called by the range constructor to implement [23.1.1]/9
|
|
template<typename _InputIterator>
|
|
void
|
|
_M_initialize_dispatch(_InputIterator __first, _InputIterator __last,
|
|
__false_type);
|
|
|
|
// Called by forward_list(n,v,a), and the range constructor when it
|
|
// turns out to be the same thing.
|
|
void
|
|
_M_fill_initialize(size_type __n, const value_type& __value);
|
|
|
|
// Called by splice_after and insert_after.
|
|
iterator
|
|
_M_splice_after(const_iterator __pos, forward_list&& __list);
|
|
|
|
// Called by forward_list(n).
|
|
void
|
|
_M_default_initialize(size_type __n);
|
|
|
|
// Called by resize(sz).
|
|
void
|
|
_M_default_insert_after(const_iterator __pos, size_type __n);
|
|
};
|
|
|
|
/**
|
|
* @brief Forward list equality comparison.
|
|
* @param lx A %forward_list
|
|
* @param ly A %forward_list of the same type as @a lx.
|
|
* @return True iff the size and elements of the forward lists are equal.
|
|
*
|
|
* This is an equivalence relation. It is linear in the size of the
|
|
* forward lists. Deques are considered equivalent if corresponding
|
|
* elements compare equal.
|
|
*/
|
|
template<typename _Tp, typename _Alloc>
|
|
bool
|
|
operator==(const forward_list<_Tp, _Alloc>& __lx,
|
|
const forward_list<_Tp, _Alloc>& __ly);
|
|
|
|
/**
|
|
* @brief Forward list ordering relation.
|
|
* @param lx A %forward_list.
|
|
* @param ly A %forward_list of the same type as @a lx.
|
|
* @return True iff @a lx is lexicographically less than @a ly.
|
|
*
|
|
* This is a total ordering relation. It is linear in the size of the
|
|
* forward lists. The elements must be comparable with @c <.
|
|
*
|
|
* See std::lexicographical_compare() for how the determination is made.
|
|
*/
|
|
template<typename _Tp, typename _Alloc>
|
|
inline bool
|
|
operator<(const forward_list<_Tp, _Alloc>& __lx,
|
|
const forward_list<_Tp, _Alloc>& __ly)
|
|
{ return std::lexicographical_compare(__lx.cbegin(), __lx.cend(),
|
|
__ly.cbegin(), __ly.cend()); }
|
|
|
|
/// Based on operator==
|
|
template<typename _Tp, typename _Alloc>
|
|
inline bool
|
|
operator!=(const forward_list<_Tp, _Alloc>& __lx,
|
|
const forward_list<_Tp, _Alloc>& __ly)
|
|
{ return !(__lx == __ly); }
|
|
|
|
/// Based on operator<
|
|
template<typename _Tp, typename _Alloc>
|
|
inline bool
|
|
operator>(const forward_list<_Tp, _Alloc>& __lx,
|
|
const forward_list<_Tp, _Alloc>& __ly)
|
|
{ return (__ly < __lx); }
|
|
|
|
/// Based on operator<
|
|
template<typename _Tp, typename _Alloc>
|
|
inline bool
|
|
operator>=(const forward_list<_Tp, _Alloc>& __lx,
|
|
const forward_list<_Tp, _Alloc>& __ly)
|
|
{ return !(__lx < __ly); }
|
|
|
|
/// Based on operator<
|
|
template<typename _Tp, typename _Alloc>
|
|
inline bool
|
|
operator<=(const forward_list<_Tp, _Alloc>& __lx,
|
|
const forward_list<_Tp, _Alloc>& __ly)
|
|
{ return !(__ly < __lx); }
|
|
|
|
/// See std::forward_list::swap().
|
|
template<typename _Tp, typename _Alloc>
|
|
inline void
|
|
swap(forward_list<_Tp, _Alloc>& __lx,
|
|
forward_list<_Tp, _Alloc>& __ly)
|
|
{ __lx.swap(__ly); }
|
|
|
|
_GLIBCXX_END_NESTED_NAMESPACE // namespace std
|
|
|
|
#endif // _FORWARD_LIST_H
|