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Diffstat (limited to 'contrib/libstdc++/include/bits/stl_deque.h')
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diff --git a/contrib/libstdc++/include/bits/stl_deque.h b/contrib/libstdc++/include/bits/stl_deque.h new file mode 100644 index 000000000000..5fa8d125e756 --- /dev/null +++ b/contrib/libstdc++/include/bits/stl_deque.h @@ -0,0 +1,1580 @@ +// deque implementation -*- C++ -*- + +// Copyright (C) 2001, 2002 Free Software Foundation, Inc. +// +// This file is part of the GNU ISO C++ Library. This library is free +// software; you can redistribute it and/or modify it under the +// terms of the GNU General Public License as published by the +// Free Software Foundation; either version 2, or (at your option) +// any later version. + +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// You should have received a copy of the GNU General Public License along +// with this library; see the file COPYING. If not, write to the Free +// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, +// USA. + +// As a special exception, you may use this file as part of a free software +// library without restriction. Specifically, if other files instantiate +// templates or use macros or inline functions from this file, or you compile +// this file and link it with other files to produce an executable, this +// file does not by itself cause the resulting executable to be covered by +// the GNU General Public License. This exception does not however +// invalidate any other reasons why the executable file might be covered by +// the GNU General Public License. + +/* + * + * Copyright (c) 1994 + * Hewlett-Packard Company + * + * Permission to use, copy, modify, distribute and sell this software + * and its documentation for any purpose is hereby granted without fee, + * provided that the above copyright notice appear in all copies and + * that both that copyright notice and this permission notice appear + * in supporting documentation. Hewlett-Packard Company makes no + * representations about the suitability of this software for any + * purpose. It is provided "as is" without express or implied warranty. + * + * + * Copyright (c) 1997 + * Silicon Graphics Computer Systems, Inc. + * + * Permission to use, copy, modify, distribute and sell this software + * and its documentation for any purpose is hereby granted without fee, + * provided that the above copyright notice appear in all copies and + * that both that copyright notice and this permission notice appear + * in supporting documentation. Silicon Graphics makes no + * representations about the suitability of this software for any + * purpose. It is provided "as is" without express or implied warranty. + */ + +/** @file stl_deque.h + * This is an internal header file, included by other library headers. + * You should not attempt to use it directly. + */ + +#include <bits/concept_check.h> +#include <bits/stl_iterator_base_types.h> +#include <bits/stl_iterator_base_funcs.h> + +#ifndef __GLIBCPP_INTERNAL_DEQUE_H +#define __GLIBCPP_INTERNAL_DEQUE_H + + +// Since this entire file is within namespace std, there's no reason to +// waste two spaces along the left column. Thus the leading indentation is +// slightly violated from here on. +namespace std +{ + +/** + * @if maint + * @brief This function controls the size of memory nodes. + * @param size The size of an element. + * @return The number (not bytesize) of elements per node. + * + * This function started off as a compiler kludge from SGI, but seems to + * be a useful wrapper around a repeated constant expression. + * @endif +*/ +inline size_t +__deque_buf_size(size_t __size) +{ return __size < 512 ? size_t(512 / __size) : size_t(1); } + + +/// A deque::iterator. +/** + * Quite a bit of intelligence here. Much of the functionality of deque is + * actually passed off to this class. A deque holds two of these internally, + * marking its valid range. Access to elements is done as offsets of either + * of those two, relying on operator overloading in this class. + * + * @if maint + * All the functions are op overloads except for _M_set_node. + * @endif +*/ +template <class _Tp, class _Ref, class _Ptr> +struct _Deque_iterator +{ + typedef _Deque_iterator<_Tp, _Tp&, _Tp*> iterator; + typedef _Deque_iterator<_Tp, const _Tp&, const _Tp*> const_iterator; + static size_t _S_buffer_size() { return __deque_buf_size(sizeof(_Tp)); } + + typedef random_access_iterator_tag iterator_category; + typedef _Tp value_type; + typedef _Ptr pointer; + typedef _Ref reference; + typedef size_t size_type; + typedef ptrdiff_t difference_type; + typedef _Tp** _Map_pointer; + typedef _Deque_iterator _Self; + + _Tp* _M_cur; + _Tp* _M_first; + _Tp* _M_last; + _Map_pointer _M_node; + + _Deque_iterator(_Tp* __x, _Map_pointer __y) + : _M_cur(__x), _M_first(*__y), + _M_last(*__y + _S_buffer_size()), _M_node(__y) {} + _Deque_iterator() : _M_cur(0), _M_first(0), _M_last(0), _M_node(0) {} + _Deque_iterator(const iterator& __x) + : _M_cur(__x._M_cur), _M_first(__x._M_first), + _M_last(__x._M_last), _M_node(__x._M_node) {} + + reference operator*() const { return *_M_cur; } + pointer operator->() const { return _M_cur; } + + difference_type operator-(const _Self& __x) const { + return difference_type(_S_buffer_size()) * (_M_node - __x._M_node - 1) + + (_M_cur - _M_first) + (__x._M_last - __x._M_cur); + } + + _Self& operator++() { + ++_M_cur; + if (_M_cur == _M_last) { + _M_set_node(_M_node + 1); + _M_cur = _M_first; + } + return *this; + } + _Self operator++(int) { + _Self __tmp = *this; + ++*this; + return __tmp; + } + + _Self& operator--() { + if (_M_cur == _M_first) { + _M_set_node(_M_node - 1); + _M_cur = _M_last; + } + --_M_cur; + return *this; + } + _Self operator--(int) { + _Self __tmp = *this; + --*this; + return __tmp; + } + + _Self& operator+=(difference_type __n) + { + difference_type __offset = __n + (_M_cur - _M_first); + if (__offset >= 0 && __offset < difference_type(_S_buffer_size())) + _M_cur += __n; + else { + difference_type __node_offset = + __offset > 0 ? __offset / difference_type(_S_buffer_size()) + : -difference_type((-__offset - 1) / _S_buffer_size()) - 1; + _M_set_node(_M_node + __node_offset); + _M_cur = _M_first + + (__offset - __node_offset * difference_type(_S_buffer_size())); + } + return *this; + } + + _Self operator+(difference_type __n) const + { + _Self __tmp = *this; + return __tmp += __n; + } + + _Self& operator-=(difference_type __n) { return *this += -__n; } + + _Self operator-(difference_type __n) const { + _Self __tmp = *this; + return __tmp -= __n; + } + + reference operator[](difference_type __n) const { return *(*this + __n); } + + bool operator==(const _Self& __x) const { return _M_cur == __x._M_cur; } + bool operator!=(const _Self& __x) const { return !(*this == __x); } + bool operator<(const _Self& __x) const { + return (_M_node == __x._M_node) ? + (_M_cur < __x._M_cur) : (_M_node < __x._M_node); + } + bool operator>(const _Self& __x) const { return __x < *this; } + bool operator<=(const _Self& __x) const { return !(__x < *this); } + bool operator>=(const _Self& __x) const { return !(*this < __x); } + + /** @if maint + * Prepares to traverse new_node. Sets everything except _M_cur, which + * should therefore be set by the caller immediately afterwards, based on + * _M_first and _M_last. + * @endif + */ + void _M_set_node(_Map_pointer __new_node) { + _M_node = __new_node; + _M_first = *__new_node; + _M_last = _M_first + difference_type(_S_buffer_size()); + } +}; + +template <class _Tp, class _Ref, class _Ptr> +inline _Deque_iterator<_Tp, _Ref, _Ptr> +operator+(ptrdiff_t __n, const _Deque_iterator<_Tp, _Ref, _Ptr>& __x) +{ + return __x + __n; +} + + +/// @if maint Primary default version. @endif +/** + * @if maint + * Deque base class. It has two purposes. First, its constructor + * and destructor allocate (but don't initialize) storage. This makes + * exception safety easier. Second, the base class encapsulates all of + * the differences between SGI-style allocators and standard-conforming + * allocators. There are two versions: this ordinary one, and the + * space-saving specialization for instanceless allocators. + * @endif +*/ +template <class _Tp, class _Alloc, bool __is_static> +class _Deque_alloc_base +{ +public: + typedef typename _Alloc_traits<_Tp,_Alloc>::allocator_type allocator_type; + allocator_type get_allocator() const { return _M_node_allocator; } + + _Deque_alloc_base(const allocator_type& __a) + : _M_node_allocator(__a), _M_map_allocator(__a), + _M_map(0), _M_map_size(0) + {} + +protected: + typedef typename _Alloc_traits<_Tp*, _Alloc>::allocator_type + _Map_allocator_type; + + allocator_type _M_node_allocator; + _Map_allocator_type _M_map_allocator; + + _Tp* _M_allocate_node() { + return _M_node_allocator.allocate(__deque_buf_size(sizeof(_Tp))); + } + void _M_deallocate_node(_Tp* __p) { + _M_node_allocator.deallocate(__p, __deque_buf_size(sizeof(_Tp))); + } + _Tp** _M_allocate_map(size_t __n) + { return _M_map_allocator.allocate(__n); } + void _M_deallocate_map(_Tp** __p, size_t __n) + { _M_map_allocator.deallocate(__p, __n); } + + _Tp** _M_map; + size_t _M_map_size; +}; + +/// @if maint Specialization for instanceless allocators. @endif +template <class _Tp, class _Alloc> +class _Deque_alloc_base<_Tp, _Alloc, true> +{ +public: + typedef typename _Alloc_traits<_Tp,_Alloc>::allocator_type allocator_type; + allocator_type get_allocator() const { return allocator_type(); } + + _Deque_alloc_base(const allocator_type&) : _M_map(0), _M_map_size(0) {} + +protected: + typedef typename _Alloc_traits<_Tp, _Alloc>::_Alloc_type _Node_alloc_type; + typedef typename _Alloc_traits<_Tp*, _Alloc>::_Alloc_type _Map_alloc_type; + + _Tp* _M_allocate_node() { + return _Node_alloc_type::allocate(__deque_buf_size(sizeof(_Tp))); + } + void _M_deallocate_node(_Tp* __p) { + _Node_alloc_type::deallocate(__p, __deque_buf_size(sizeof(_Tp))); + } + _Tp** _M_allocate_map(size_t __n) + { return _Map_alloc_type::allocate(__n); } + void _M_deallocate_map(_Tp** __p, size_t __n) + { _Map_alloc_type::deallocate(__p, __n); } + + _Tp** _M_map; + size_t _M_map_size; +}; + + +/** + * @if maint + * Deque base class. Using _Alloc_traits in the instantiation of the parent + * class provides the compile-time dispatching mentioned in the parent's docs. + * This class provides the unified face for deque's allocation. + * + * Nothing in this class ever constructs or destroys an actual Tp element. + * (Deque handles that itself.) Only/All memory management is performed here. + * @endif +*/ +template <class _Tp, class _Alloc> +class _Deque_base + : public _Deque_alloc_base<_Tp,_Alloc, + _Alloc_traits<_Tp, _Alloc>::_S_instanceless> +{ +public: + typedef _Deque_alloc_base<_Tp,_Alloc, + _Alloc_traits<_Tp, _Alloc>::_S_instanceless> + _Base; + typedef typename _Base::allocator_type allocator_type; + typedef _Deque_iterator<_Tp,_Tp&,_Tp*> iterator; + typedef _Deque_iterator<_Tp,const _Tp&,const _Tp*> const_iterator; + + _Deque_base(const allocator_type& __a, size_t __num_elements) + : _Base(__a), _M_start(), _M_finish() + { _M_initialize_map(__num_elements); } + _Deque_base(const allocator_type& __a) + : _Base(__a), _M_start(), _M_finish() {} + ~_Deque_base(); + +protected: + void _M_initialize_map(size_t); + void _M_create_nodes(_Tp** __nstart, _Tp** __nfinish); + void _M_destroy_nodes(_Tp** __nstart, _Tp** __nfinish); + enum { _S_initial_map_size = 8 }; + +protected: + iterator _M_start; + iterator _M_finish; +}; + + +template <class _Tp, class _Alloc> +_Deque_base<_Tp,_Alloc>::~_Deque_base() +{ + if (_M_map) { + _M_destroy_nodes(_M_start._M_node, _M_finish._M_node + 1); + _M_deallocate_map(_M_map, _M_map_size); + } +} + +/** + * @if maint + * @brief Layout storage. + * @param num_elements The count of T's for which to allocate space at first. + * @return Nothing. + * + * The initial underlying memory layout is a bit complicated... + * @endif +*/ +template <class _Tp, class _Alloc> +void +_Deque_base<_Tp,_Alloc>::_M_initialize_map(size_t __num_elements) +{ + size_t __num_nodes = + __num_elements / __deque_buf_size(sizeof(_Tp)) + 1; + + _M_map_size = max((size_t) _S_initial_map_size, __num_nodes + 2); + _M_map = _M_allocate_map(_M_map_size); + + _Tp** __nstart = _M_map + (_M_map_size - __num_nodes) / 2; + _Tp** __nfinish = __nstart + __num_nodes; + + try + { _M_create_nodes(__nstart, __nfinish); } + catch(...) + { + _M_deallocate_map(_M_map, _M_map_size); + _M_map = 0; + _M_map_size = 0; + __throw_exception_again; + } + + _M_start._M_set_node(__nstart); + _M_finish._M_set_node(__nfinish - 1); + _M_start._M_cur = _M_start._M_first; + _M_finish._M_cur = _M_finish._M_first + + __num_elements % __deque_buf_size(sizeof(_Tp)); +} + +template <class _Tp, class _Alloc> +void _Deque_base<_Tp,_Alloc>::_M_create_nodes(_Tp** __nstart, _Tp** __nfinish) +{ + _Tp** __cur; + try { + for (__cur = __nstart; __cur < __nfinish; ++__cur) + *__cur = _M_allocate_node(); + } + catch(...) + { + _M_destroy_nodes(__nstart, __cur); + __throw_exception_again; + } +} + +template <class _Tp, class _Alloc> +void +_Deque_base<_Tp,_Alloc>::_M_destroy_nodes(_Tp** __nstart, _Tp** __nfinish) +{ + for (_Tp** __n = __nstart; __n < __nfinish; ++__n) + _M_deallocate_node(*__n); +} + + +/** + * @ingroup Containers + * @ingroup Sequences + * + * Meets the requirements of a <a href="tables.html#65">container</a>, a + * <a href="tables.html#66">reversible container</a>, and a + * <a href="tables.html#67">sequence</a>, including the + * <a href="tables.html#68">optional sequence requirements</a>. + * + * Placeholder: see http://www.sgi.com/tech/stl/Deque.html for now. + * + * In previous HP/SGI versions of deque, there was an extra template parameter + * so users could control the node size. This extension turned out to violate + * the C++ standard (it can be detected using template template parameters), + * and it was removed. + * + * @if maint + * Here's how a deque<Tp> manages memory. Each deque has 4 members: + * + * - Tp** _M_map + * - size_t _M_map_size + * - iterator _M_start, _M_finish + * + * map_size is at least 8. %map is an array of map_size pointers-to-"nodes". + * (The name has nothing to do with the std::map class.) + * + * A "node" has no specific type name as such, but it is referred to as + * "node" in this file. It is a simple array-of-Tp. If Tp is very large, + * there will be one Tp element per node (i.e., an "array" of one). + * For non-huge Tp's, node size is inversely related to Tp size: the + * larger the Tp, the fewer Tp's will fit in a node. The goal here is to + * keep the total size of a node relatively small and constant over different + * Tp's, to improve allocator efficiency. + * + * **** As I write this, the nodes are /not/ allocated using the high-speed + * memory pool. There are 20 hours left in the year; perhaps I can fix + * this before 2002. + * + * Not every pointer in the %map array will point to a node. If the initial + * number of elements in the deque is small, the /middle/ %map pointers will + * be valid, and the ones at the edges will be unused. This same situation + * will arise as the %map grows: available %map pointers, if any, will be on + * the ends. As new nodes are created, only a subset of the %map's pointers + * need to be copied "outward". + * + * Class invariants: + * - For any nonsingular iterator i: + * - i.node points to a member of the %map array. (Yes, you read that + * correctly: i.node does not actually point to a node.) The member of + * the %map array is what actually points to the node. + * - i.first == *(i.node) (This points to the node (first Tp element).) + * - i.last == i.first + node_size + * - i.cur is a pointer in the range [i.first, i.last). NOTE: + * the implication of this is that i.cur is always a dereferenceable + * pointer, even if i is a past-the-end iterator. + * - Start and Finish are always nonsingular iterators. NOTE: this means that + * an empty deque must have one node, a deque with <N elements (where N is + * the node buffer size) must have one node, a deque with N through (2N-1) + * elements must have two nodes, etc. + * - For every node other than start.node and finish.node, every element in the + * node is an initialized object. If start.node == finish.node, then + * [start.cur, finish.cur) are initialized objects, and the elements outside + * that range are uninitialized storage. Otherwise, [start.cur, start.last) + * and [finish.first, finish.cur) are initialized objects, and [start.first, + * start.cur) and [finish.cur, finish.last) are uninitialized storage. + * - [%map, %map + map_size) is a valid, non-empty range. + * - [start.node, finish.node] is a valid range contained within + * [%map, %map + map_size). + * - A pointer in the range [%map, %map + map_size) points to an allocated node + * if and only if the pointer is in the range [start.node, finish.node]. + * + * Here's the magic: nothing in deque is "aware" of the discontiguous storage! + * + * The memory setup and layout occurs in the parent, _Base, and the iterator + * class is entirely responsible for "leaping" from one node to the next. All + * the implementation routines for deque itself work only through the start + * and finish iterators. This keeps the routines simple and sane, and we can + * use other standard algorithms as well. + * @endif +*/ +template <class _Tp, class _Alloc = allocator<_Tp> > +class deque : protected _Deque_base<_Tp, _Alloc> +{ + // concept requirements + __glibcpp_class_requires(_Tp, _SGIAssignableConcept) + + typedef _Deque_base<_Tp, _Alloc> _Base; + +public: + typedef _Tp value_type; + typedef value_type* pointer; + typedef const value_type* const_pointer; + typedef value_type& reference; + typedef const value_type& const_reference; + typedef size_t size_type; + typedef ptrdiff_t difference_type; + + typedef typename _Base::allocator_type allocator_type; + allocator_type get_allocator() const { return _Base::get_allocator(); } + + typedef typename _Base::iterator iterator; + typedef typename _Base::const_iterator const_iterator; + typedef reverse_iterator<const_iterator> const_reverse_iterator; + typedef reverse_iterator<iterator> reverse_iterator; + +protected: + typedef pointer* _Map_pointer; + static size_t _S_buffer_size() { return __deque_buf_size(sizeof(_Tp)); } + + // Functions controlling memory layout, and nothing else. + using _Base::_M_initialize_map; + using _Base::_M_create_nodes; + using _Base::_M_destroy_nodes; + using _Base::_M_allocate_node; + using _Base::_M_deallocate_node; + using _Base::_M_allocate_map; + using _Base::_M_deallocate_map; + + /** @if maint + * A total of four data members accumulated down the heirarchy. If the + * _Alloc type requires separate instances, then two of them will also be + * included in each deque. + * @endif + */ + using _Base::_M_map; + using _Base::_M_map_size; + using _Base::_M_start; + using _Base::_M_finish; + +public: // Basic accessors + iterator begin() { return _M_start; } + iterator end() { return _M_finish; } + const_iterator begin() const { return _M_start; } + const_iterator end() const { return _M_finish; } + + reverse_iterator rbegin() { return reverse_iterator(_M_finish); } + reverse_iterator rend() { return reverse_iterator(_M_start); } + const_reverse_iterator rbegin() const + { return const_reverse_iterator(_M_finish); } + const_reverse_iterator rend() const + { return const_reverse_iterator(_M_start); } + + reference operator[](size_type __n) + { return _M_start[difference_type(__n)]; } + const_reference operator[](size_type __n) const + { return _M_start[difference_type(__n)]; } + + void _M_range_check(size_type __n) const { + if (__n >= this->size()) + __throw_range_error("deque"); + } + + reference at(size_type __n) + { _M_range_check(__n); return (*this)[__n]; } + const_reference at(size_type __n) const + { _M_range_check(__n); return (*this)[__n]; } + + reference front() { return *_M_start; } + reference back() { + iterator __tmp = _M_finish; + --__tmp; + return *__tmp; + } + const_reference front() const { return *_M_start; } + const_reference back() const { + const_iterator __tmp = _M_finish; + --__tmp; + return *__tmp; + } + + size_type size() const { return _M_finish - _M_start; } + size_type max_size() const { return size_type(-1); } + bool empty() const { return _M_finish == _M_start; } + +public: // Constructor, destructor. + explicit deque(const allocator_type& __a = allocator_type()) + : _Base(__a, 0) {} + deque(const deque& __x) : _Base(__x.get_allocator(), __x.size()) + { uninitialized_copy(__x.begin(), __x.end(), _M_start); } + deque(size_type __n, const value_type& __value, + const allocator_type& __a = allocator_type()) : _Base(__a, __n) + { _M_fill_initialize(__value); } + + explicit + deque(size_type __n) + : _Base(allocator_type(), __n) + { _M_fill_initialize(value_type()); } + + // Check whether it's an integral type. If so, it's not an iterator. + template<class _InputIterator> + deque(_InputIterator __first, _InputIterator __last, + const allocator_type& __a = allocator_type()) + : _Base(__a) + { + typedef typename _Is_integer<_InputIterator>::_Integral _Integral; + _M_initialize_dispatch(__first, __last, _Integral()); + } + + template<class _Integer> + void + _M_initialize_dispatch(_Integer __n, _Integer __x, __true_type) + { + _M_initialize_map(__n); + _M_fill_initialize(__x); + } + + template<class _InputIter> + void + _M_initialize_dispatch(_InputIter __first, _InputIter __last, __false_type) + { + typedef typename iterator_traits<_InputIter>::iterator_category _IterCategory; + _M_range_initialize(__first, __last, _IterCategory()); + } + + ~deque() + { _Destroy(_M_start, _M_finish); } + + deque& operator= (const deque& __x) { + const size_type __len = size(); + if (&__x != this) { + if (__len >= __x.size()) + erase(copy(__x.begin(), __x.end(), _M_start), _M_finish); + else { + const_iterator __mid = __x.begin() + difference_type(__len); + copy(__x.begin(), __mid, _M_start); + insert(_M_finish, __mid, __x.end()); + } + } + return *this; + } + + void swap(deque& __x) { + std::swap(_M_start, __x._M_start); + std::swap(_M_finish, __x._M_finish); + std::swap(_M_map, __x._M_map); + std::swap(_M_map_size, __x._M_map_size); + } + +public: + // assign(), a generalized assignment member function. Two + // versions: one that takes a count, and one that takes a range. + // The range version is a member template, so we dispatch on whether + // or not the type is an integer. + + void _M_fill_assign(size_type __n, const _Tp& __val) { + if (__n > size()) { + fill(begin(), end(), __val); + insert(end(), __n - size(), __val); + } + else { + erase(begin() + __n, end()); + fill(begin(), end(), __val); + } + } + + void + assign(size_type __n, const _Tp& __val) + { _M_fill_assign(__n, __val); } + + template<class _InputIterator> + void + assign(_InputIterator __first, _InputIterator __last) + { + typedef typename _Is_integer<_InputIterator>::_Integral _Integral; + _M_assign_dispatch(__first, __last, _Integral()); + } + +private: // helper functions for assign() + + template<class _Integer> + void + _M_assign_dispatch(_Integer __n, _Integer __val, __true_type) + { _M_fill_assign(static_cast<size_type>(__n), static_cast<_Tp>(__val)); } + + template<class _InputIterator> + void + _M_assign_dispatch(_InputIterator __first, _InputIterator __last, __false_type) + { + typedef typename iterator_traits<_InputIterator>::iterator_category _IterCategory; + _M_assign_aux(__first, __last, _IterCategory()); + } + + template <class _InputIterator> + void _M_assign_aux(_InputIterator __first, _InputIterator __last, + input_iterator_tag); + + template <class _ForwardIterator> + void _M_assign_aux(_ForwardIterator __first, _ForwardIterator __last, + forward_iterator_tag) { + size_type __len = distance(__first, __last); + if (__len > size()) { + _ForwardIterator __mid = __first; + advance(__mid, size()); + copy(__first, __mid, begin()); + insert(end(), __mid, __last); + } + else + erase(copy(__first, __last, begin()), end()); + } + +public: // push_* and pop_* + + void + push_back(const value_type& __t) + { + if (_M_finish._M_cur != _M_finish._M_last - 1) { + _Construct(_M_finish._M_cur, __t); + ++_M_finish._M_cur; + } + else + _M_push_back_aux(__t); + } + + void + push_back() + { + if (_M_finish._M_cur != _M_finish._M_last - 1) { + _Construct(_M_finish._M_cur); + ++_M_finish._M_cur; + } + else + _M_push_back_aux(); + } + + void + push_front(const value_type& __t) + { + if (_M_start._M_cur != _M_start._M_first) { + _Construct(_M_start._M_cur - 1, __t); + --_M_start._M_cur; + } + else + _M_push_front_aux(__t); + } + + void + push_front() + { + if (_M_start._M_cur != _M_start._M_first) { + _Construct(_M_start._M_cur - 1); + --_M_start._M_cur; + } + else + _M_push_front_aux(); + } + + + void + pop_back() + { + if (_M_finish._M_cur != _M_finish._M_first) { + --_M_finish._M_cur; + _Destroy(_M_finish._M_cur); + } + else + _M_pop_back_aux(); + } + + void + pop_front() + { + if (_M_start._M_cur != _M_start._M_last - 1) { + _Destroy(_M_start._M_cur); + ++_M_start._M_cur; + } + else + _M_pop_front_aux(); + } + +public: // Insert + + iterator + insert(iterator position, const value_type& __x) + { + if (position._M_cur == _M_start._M_cur) { + push_front(__x); + return _M_start; + } + else if (position._M_cur == _M_finish._M_cur) { + push_back(__x); + iterator __tmp = _M_finish; + --__tmp; + return __tmp; + } + else { + return _M_insert_aux(position, __x); + } + } + + iterator + insert(iterator __position) + { return insert(__position, value_type()); } + + void + insert(iterator __pos, size_type __n, const value_type& __x) + { _M_fill_insert(__pos, __n, __x); } + + void + _M_fill_insert(iterator __pos, size_type __n, const value_type& __x); + + // Check whether it's an integral type. If so, it's not an iterator. + template<class _InputIterator> + void + insert(iterator __pos, _InputIterator __first, _InputIterator __last) + { + typedef typename _Is_integer<_InputIterator>::_Integral _Integral; + _M_insert_dispatch(__pos, __first, __last, _Integral()); + } + + template<class _Integer> + void + _M_insert_dispatch(iterator __pos, _Integer __n, _Integer __x, __true_type) + { _M_fill_insert(__pos, static_cast<size_type>(__n), static_cast<value_type>(__x)); } + + template<class _InputIterator> + void + _M_insert_dispatch(iterator __pos, + _InputIterator __first, _InputIterator __last, + __false_type) + { + typedef typename iterator_traits<_InputIterator>::iterator_category _IterCategory; + insert(__pos, __first, __last, _IterCategory()); + } + + void resize(size_type __new_size, const value_type& __x) { + const size_type __len = size(); + if (__new_size < __len) + erase(_M_start + __new_size, _M_finish); + else + insert(_M_finish, __new_size - __len, __x); + } + + void resize(size_type new_size) { resize(new_size, value_type()); } + +public: // Erase + iterator erase(iterator __pos) { + iterator __next = __pos; + ++__next; + size_type __index = __pos - _M_start; + if (__index < (size() >> 1)) { + copy_backward(_M_start, __pos, __next); + pop_front(); + } + else { + copy(__next, _M_finish, __pos); + pop_back(); + } + return _M_start + __index; + } + + iterator erase(iterator __first, iterator __last); + void clear(); + +protected: // Internal construction/destruction + + void _M_fill_initialize(const value_type& __value); + + template <class _InputIterator> + void _M_range_initialize(_InputIterator __first, _InputIterator __last, + input_iterator_tag); + + template <class _ForwardIterator> + void _M_range_initialize(_ForwardIterator __first, _ForwardIterator __last, + forward_iterator_tag); + +protected: // Internal push_* and pop_* + + void _M_push_back_aux(const value_type&); + void _M_push_back_aux(); + void _M_push_front_aux(const value_type&); + void _M_push_front_aux(); + void _M_pop_back_aux(); + void _M_pop_front_aux(); + +protected: // Internal insert functions + + template <class _InputIterator> + void insert(iterator __pos, _InputIterator __first, _InputIterator __last, + input_iterator_tag); + + template <class _ForwardIterator> + void insert(iterator __pos, + _ForwardIterator __first, _ForwardIterator __last, + forward_iterator_tag); + + iterator _M_insert_aux(iterator __pos, const value_type& __x); + iterator _M_insert_aux(iterator __pos); + void _M_insert_aux(iterator __pos, size_type __n, const value_type& __x); + + template <class _ForwardIterator> + void _M_insert_aux(iterator __pos, + _ForwardIterator __first, _ForwardIterator __last, + size_type __n); + + iterator _M_reserve_elements_at_front(size_type __n) { + size_type __vacancies = _M_start._M_cur - _M_start._M_first; + if (__n > __vacancies) + _M_new_elements_at_front(__n - __vacancies); + return _M_start - difference_type(__n); + } + + iterator _M_reserve_elements_at_back(size_type __n) { + size_type __vacancies = (_M_finish._M_last - _M_finish._M_cur) - 1; + if (__n > __vacancies) + _M_new_elements_at_back(__n - __vacancies); + return _M_finish + difference_type(__n); + } + + void _M_new_elements_at_front(size_type __new_elements); + void _M_new_elements_at_back(size_type __new_elements); + +protected: // Allocation of _M_map and nodes + + // Makes sure the _M_map has space for new nodes. Does not actually + // add the nodes. Can invalidate _M_map pointers. (And consequently, + // deque iterators.) + + void _M_reserve_map_at_back (size_type __nodes_to_add = 1) { + if (__nodes_to_add + 1 > _M_map_size - (_M_finish._M_node - _M_map)) + _M_reallocate_map(__nodes_to_add, false); + } + + void _M_reserve_map_at_front (size_type __nodes_to_add = 1) { + if (__nodes_to_add > size_type(_M_start._M_node - _M_map)) + _M_reallocate_map(__nodes_to_add, true); + } + + void _M_reallocate_map(size_type __nodes_to_add, bool __add_at_front); +}; + +// Non-inline member functions + +template <class _Tp, class _Alloc> +template <class _InputIter> +void deque<_Tp, _Alloc> + ::_M_assign_aux(_InputIter __first, _InputIter __last, input_iterator_tag) +{ + iterator __cur = begin(); + for ( ; __first != __last && __cur != end(); ++__cur, ++__first) + *__cur = *__first; + if (__first == __last) + erase(__cur, end()); + else + insert(end(), __first, __last); +} + +template <class _Tp, class _Alloc> +void deque<_Tp, _Alloc>::_M_fill_insert(iterator __pos, + size_type __n, const value_type& __x) +{ + if (__pos._M_cur == _M_start._M_cur) { + iterator __new_start = _M_reserve_elements_at_front(__n); + try { + uninitialized_fill(__new_start, _M_start, __x); + _M_start = __new_start; + } + catch(...) + { + _M_destroy_nodes(__new_start._M_node, _M_start._M_node); + __throw_exception_again; + } + } + else if (__pos._M_cur == _M_finish._M_cur) { + iterator __new_finish = _M_reserve_elements_at_back(__n); + try { + uninitialized_fill(_M_finish, __new_finish, __x); + _M_finish = __new_finish; + } + catch(...) + { + _M_destroy_nodes(_M_finish._M_node + 1, __new_finish._M_node + 1); + __throw_exception_again; + } + } + else + _M_insert_aux(__pos, __n, __x); +} + +template <class _Tp, class _Alloc> +typename deque<_Tp,_Alloc>::iterator +deque<_Tp,_Alloc>::erase(iterator __first, iterator __last) +{ + if (__first == _M_start && __last == _M_finish) { + clear(); + return _M_finish; + } + else { + difference_type __n = __last - __first; + difference_type __elems_before = __first - _M_start; + if (static_cast<size_type>(__elems_before) < (size() - __n) / 2) { + copy_backward(_M_start, __first, __last); + iterator __new_start = _M_start + __n; + _Destroy(_M_start, __new_start); + _M_destroy_nodes(_M_start._M_node, __new_start._M_node); + _M_start = __new_start; + } + else { + copy(__last, _M_finish, __first); + iterator __new_finish = _M_finish - __n; + _Destroy(__new_finish, _M_finish); + _M_destroy_nodes(__new_finish._M_node + 1, _M_finish._M_node + 1); + _M_finish = __new_finish; + } + return _M_start + __elems_before; + } +} + +template <class _Tp, class _Alloc> +void deque<_Tp,_Alloc>::clear() +{ + for (_Map_pointer __node = _M_start._M_node + 1; + __node < _M_finish._M_node; + ++__node) { + _Destroy(*__node, *__node + _S_buffer_size()); + _M_deallocate_node(*__node); + } + + if (_M_start._M_node != _M_finish._M_node) { + _Destroy(_M_start._M_cur, _M_start._M_last); + _Destroy(_M_finish._M_first, _M_finish._M_cur); + _M_deallocate_node(_M_finish._M_first); + } + else + _Destroy(_M_start._M_cur, _M_finish._M_cur); + + _M_finish = _M_start; +} + +/** + * @if maint + * @brief Fills the deque with copies of value. + * @param value Initial value. + * @return Nothing. + * @pre _M_start and _M_finish have already been initialized, but none of the + * deque's elements have yet been constructed. + * + * This function is called only when the user provides an explicit size (with + * or without an explicit exemplar value). + * @endif +*/ +template <class _Tp, class _Alloc> +void deque<_Tp,_Alloc>::_M_fill_initialize(const value_type& __value) +{ + _Map_pointer __cur; + try { + for (__cur = _M_start._M_node; __cur < _M_finish._M_node; ++__cur) + uninitialized_fill(*__cur, *__cur + _S_buffer_size(), __value); + uninitialized_fill(_M_finish._M_first, _M_finish._M_cur, __value); + } + catch(...) + { + _Destroy(_M_start, iterator(*__cur, __cur)); + __throw_exception_again; + } +} + +/** @{ + * @if maint + * @brief Fills the deque with whatever is in [first,last). + * @param first An input iterator. + * @param last An input iterator. + * @return Nothing. + * + * If the iterators are actually forward iterators (or better), then the + * memory layout can be done all at once. Else we move forward using + * push_back on each value from the iterator. + * @endif +*/ +template <class _Tp, class _Alloc> template <class _InputIterator> +void deque<_Tp,_Alloc>::_M_range_initialize(_InputIterator __first, + _InputIterator __last, + input_iterator_tag) +{ + _M_initialize_map(0); + try { + for ( ; __first != __last; ++__first) + push_back(*__first); + } + catch(...) + { + clear(); + __throw_exception_again; + } +} + +template <class _Tp, class _Alloc> template <class _ForwardIterator> +void deque<_Tp,_Alloc>::_M_range_initialize(_ForwardIterator __first, + _ForwardIterator __last, + forward_iterator_tag) +{ + size_type __n = distance(__first, __last); + _M_initialize_map(__n); + + _Map_pointer __cur_node; + try { + for (__cur_node = _M_start._M_node; + __cur_node < _M_finish._M_node; + ++__cur_node) { + _ForwardIterator __mid = __first; + advance(__mid, _S_buffer_size()); + uninitialized_copy(__first, __mid, *__cur_node); + __first = __mid; + } + uninitialized_copy(__first, __last, _M_finish._M_first); + } + catch(...) + { + _Destroy(_M_start, iterator(*__cur_node, __cur_node)); + __throw_exception_again; + } +} +/** @} */ + +// Called only if _M_finish._M_cur == _M_finish._M_last - 1. +template <class _Tp, class _Alloc> +void +deque<_Tp,_Alloc>::_M_push_back_aux(const value_type& __t) +{ + value_type __t_copy = __t; + _M_reserve_map_at_back(); + *(_M_finish._M_node + 1) = _M_allocate_node(); + try { + _Construct(_M_finish._M_cur, __t_copy); + _M_finish._M_set_node(_M_finish._M_node + 1); + _M_finish._M_cur = _M_finish._M_first; + } + catch(...) + { + _M_deallocate_node(*(_M_finish._M_node + 1)); + __throw_exception_again; + } +} + +// Called only if _M_finish._M_cur == _M_finish._M_last - 1. +template <class _Tp, class _Alloc> +void +deque<_Tp,_Alloc>::_M_push_back_aux() +{ + _M_reserve_map_at_back(); + *(_M_finish._M_node + 1) = _M_allocate_node(); + try { + _Construct(_M_finish._M_cur); + _M_finish._M_set_node(_M_finish._M_node + 1); + _M_finish._M_cur = _M_finish._M_first; + } + catch(...) + { + _M_deallocate_node(*(_M_finish._M_node + 1)); + __throw_exception_again; + } +} + +// Called only if _M_start._M_cur == _M_start._M_first. +template <class _Tp, class _Alloc> +void +deque<_Tp,_Alloc>::_M_push_front_aux(const value_type& __t) +{ + value_type __t_copy = __t; + _M_reserve_map_at_front(); + *(_M_start._M_node - 1) = _M_allocate_node(); + try { + _M_start._M_set_node(_M_start._M_node - 1); + _M_start._M_cur = _M_start._M_last - 1; + _Construct(_M_start._M_cur, __t_copy); + } + catch(...) + { + ++_M_start; + _M_deallocate_node(*(_M_start._M_node - 1)); + __throw_exception_again; + } +} + +// Called only if _M_start._M_cur == _M_start._M_first. +template <class _Tp, class _Alloc> +void +deque<_Tp,_Alloc>::_M_push_front_aux() +{ + _M_reserve_map_at_front(); + *(_M_start._M_node - 1) = _M_allocate_node(); + try { + _M_start._M_set_node(_M_start._M_node - 1); + _M_start._M_cur = _M_start._M_last - 1; + _Construct(_M_start._M_cur); + } + catch(...) + { + ++_M_start; + _M_deallocate_node(*(_M_start._M_node - 1)); + __throw_exception_again; + } +} + +// Called only if _M_finish._M_cur == _M_finish._M_first. +template <class _Tp, class _Alloc> +void deque<_Tp,_Alloc>::_M_pop_back_aux() +{ + _M_deallocate_node(_M_finish._M_first); + _M_finish._M_set_node(_M_finish._M_node - 1); + _M_finish._M_cur = _M_finish._M_last - 1; + _Destroy(_M_finish._M_cur); +} + +// Called only if _M_start._M_cur == _M_start._M_last - 1. Note that +// if the deque has at least one element (a precondition for this member +// function), and if _M_start._M_cur == _M_start._M_last, then the deque +// must have at least two nodes. +template <class _Tp, class _Alloc> +void deque<_Tp,_Alloc>::_M_pop_front_aux() +{ + _Destroy(_M_start._M_cur); + _M_deallocate_node(_M_start._M_first); + _M_start._M_set_node(_M_start._M_node + 1); + _M_start._M_cur = _M_start._M_first; +} + +template <class _Tp, class _Alloc> template <class _InputIterator> +void deque<_Tp,_Alloc>::insert(iterator __pos, + _InputIterator __first, _InputIterator __last, + input_iterator_tag) +{ + copy(__first, __last, inserter(*this, __pos)); +} + +template <class _Tp, class _Alloc> template <class _ForwardIterator> +void +deque<_Tp,_Alloc>::insert(iterator __pos, + _ForwardIterator __first, _ForwardIterator __last, + forward_iterator_tag) { + size_type __n = distance(__first, __last); + if (__pos._M_cur == _M_start._M_cur) { + iterator __new_start = _M_reserve_elements_at_front(__n); + try { + uninitialized_copy(__first, __last, __new_start); + _M_start = __new_start; + } + catch(...) + { + _M_destroy_nodes(__new_start._M_node, _M_start._M_node); + __throw_exception_again; + } + } + else if (__pos._M_cur == _M_finish._M_cur) { + iterator __new_finish = _M_reserve_elements_at_back(__n); + try { + uninitialized_copy(__first, __last, _M_finish); + _M_finish = __new_finish; + } + catch(...) + { + _M_destroy_nodes(_M_finish._M_node + 1, __new_finish._M_node + 1); + __throw_exception_again; + } + } + else + _M_insert_aux(__pos, __first, __last, __n); +} + +template <class _Tp, class _Alloc> +typename deque<_Tp, _Alloc>::iterator +deque<_Tp,_Alloc>::_M_insert_aux(iterator __pos, const value_type& __x) +{ + difference_type __index = __pos - _M_start; + value_type __x_copy = __x; + if (static_cast<size_type>(__index) < size() / 2) { + push_front(front()); + iterator __front1 = _M_start; + ++__front1; + iterator __front2 = __front1; + ++__front2; + __pos = _M_start + __index; + iterator __pos1 = __pos; + ++__pos1; + copy(__front2, __pos1, __front1); + } + else { + push_back(back()); + iterator __back1 = _M_finish; + --__back1; + iterator __back2 = __back1; + --__back2; + __pos = _M_start + __index; + copy_backward(__pos, __back2, __back1); + } + *__pos = __x_copy; + return __pos; +} + +template <class _Tp, class _Alloc> +typename deque<_Tp,_Alloc>::iterator +deque<_Tp,_Alloc>::_M_insert_aux(iterator __pos) +{ + difference_type __index = __pos - _M_start; + if (static_cast<size_type>(__index) < size() / 2) { + push_front(front()); + iterator __front1 = _M_start; + ++__front1; + iterator __front2 = __front1; + ++__front2; + __pos = _M_start + __index; + iterator __pos1 = __pos; + ++__pos1; + copy(__front2, __pos1, __front1); + } + else { + push_back(back()); + iterator __back1 = _M_finish; + --__back1; + iterator __back2 = __back1; + --__back2; + __pos = _M_start + __index; + copy_backward(__pos, __back2, __back1); + } + *__pos = value_type(); + return __pos; +} + +template <class _Tp, class _Alloc> +void deque<_Tp,_Alloc>::_M_insert_aux(iterator __pos, + size_type __n, + const value_type& __x) +{ + const difference_type __elems_before = __pos - _M_start; + size_type __length = this->size(); + value_type __x_copy = __x; + if (__elems_before < difference_type(__length / 2)) { + iterator __new_start = _M_reserve_elements_at_front(__n); + iterator __old_start = _M_start; + __pos = _M_start + __elems_before; + try { + if (__elems_before >= difference_type(__n)) { + iterator __start_n = _M_start + difference_type(__n); + uninitialized_copy(_M_start, __start_n, __new_start); + _M_start = __new_start; + copy(__start_n, __pos, __old_start); + fill(__pos - difference_type(__n), __pos, __x_copy); + } + else { + __uninitialized_copy_fill(_M_start, __pos, __new_start, + _M_start, __x_copy); + _M_start = __new_start; + fill(__old_start, __pos, __x_copy); + } + } + catch(...) + { + _M_destroy_nodes(__new_start._M_node, _M_start._M_node); + __throw_exception_again; + } + } + else { + iterator __new_finish = _M_reserve_elements_at_back(__n); + iterator __old_finish = _M_finish; + const difference_type __elems_after = + difference_type(__length) - __elems_before; + __pos = _M_finish - __elems_after; + try { + if (__elems_after > difference_type(__n)) { + iterator __finish_n = _M_finish - difference_type(__n); + uninitialized_copy(__finish_n, _M_finish, _M_finish); + _M_finish = __new_finish; + copy_backward(__pos, __finish_n, __old_finish); + fill(__pos, __pos + difference_type(__n), __x_copy); + } + else { + __uninitialized_fill_copy(_M_finish, __pos + difference_type(__n), + __x_copy, __pos, _M_finish); + _M_finish = __new_finish; + fill(__pos, __old_finish, __x_copy); + } + } + catch(...) + { + _M_destroy_nodes(_M_finish._M_node + 1, __new_finish._M_node + 1); + __throw_exception_again; + } + } +} + +template <class _Tp, class _Alloc> template <class _ForwardIterator> +void deque<_Tp,_Alloc>::_M_insert_aux(iterator __pos, + _ForwardIterator __first, + _ForwardIterator __last, + size_type __n) +{ + const difference_type __elemsbefore = __pos - _M_start; + size_type __length = size(); + if (static_cast<size_type>(__elemsbefore) < __length / 2) { + iterator __new_start = _M_reserve_elements_at_front(__n); + iterator __old_start = _M_start; + __pos = _M_start + __elemsbefore; + try { + if (__elemsbefore >= difference_type(__n)) { + iterator __start_n = _M_start + difference_type(__n); + uninitialized_copy(_M_start, __start_n, __new_start); + _M_start = __new_start; + copy(__start_n, __pos, __old_start); + copy(__first, __last, __pos - difference_type(__n)); + } + else { + _ForwardIterator __mid = __first; + advance(__mid, difference_type(__n) - __elemsbefore); + __uninitialized_copy_copy(_M_start, __pos, __first, __mid, + __new_start); + _M_start = __new_start; + copy(__mid, __last, __old_start); + } + } + catch(...) + { + _M_destroy_nodes(__new_start._M_node, _M_start._M_node); + __throw_exception_again; + } + } + else { + iterator __new_finish = _M_reserve_elements_at_back(__n); + iterator __old_finish = _M_finish; + const difference_type __elemsafter = + difference_type(__length) - __elemsbefore; + __pos = _M_finish - __elemsafter; + try { + if (__elemsafter > difference_type(__n)) { + iterator __finish_n = _M_finish - difference_type(__n); + uninitialized_copy(__finish_n, _M_finish, _M_finish); + _M_finish = __new_finish; + copy_backward(__pos, __finish_n, __old_finish); + copy(__first, __last, __pos); + } + else { + _ForwardIterator __mid = __first; + advance(__mid, __elemsafter); + __uninitialized_copy_copy(__mid, __last, __pos, _M_finish, _M_finish); + _M_finish = __new_finish; + copy(__first, __mid, __pos); + } + } + catch(...) + { + _M_destroy_nodes(_M_finish._M_node + 1, __new_finish._M_node + 1); + __throw_exception_again; + } + } +} + +template <class _Tp, class _Alloc> +void deque<_Tp,_Alloc>::_M_new_elements_at_front(size_type __new_elems) +{ + size_type __new_nodes + = (__new_elems + _S_buffer_size() - 1) / _S_buffer_size(); + _M_reserve_map_at_front(__new_nodes); + size_type __i; + try { + for (__i = 1; __i <= __new_nodes; ++__i) + *(_M_start._M_node - __i) = _M_allocate_node(); + } + catch(...) { + for (size_type __j = 1; __j < __i; ++__j) + _M_deallocate_node(*(_M_start._M_node - __j)); + __throw_exception_again; + } +} + +template <class _Tp, class _Alloc> +void deque<_Tp,_Alloc>::_M_new_elements_at_back(size_type __new_elems) +{ + size_type __new_nodes + = (__new_elems + _S_buffer_size() - 1) / _S_buffer_size(); + _M_reserve_map_at_back(__new_nodes); + size_type __i; + try { + for (__i = 1; __i <= __new_nodes; ++__i) + *(_M_finish._M_node + __i) = _M_allocate_node(); + } + catch(...) { + for (size_type __j = 1; __j < __i; ++__j) + _M_deallocate_node(*(_M_finish._M_node + __j)); + __throw_exception_again; + } +} + +template <class _Tp, class _Alloc> +void deque<_Tp,_Alloc>::_M_reallocate_map(size_type __nodes_to_add, + bool __add_at_front) +{ + size_type __old_num_nodes = _M_finish._M_node - _M_start._M_node + 1; + size_type __new_num_nodes = __old_num_nodes + __nodes_to_add; + + _Map_pointer __new_nstart; + if (_M_map_size > 2 * __new_num_nodes) { + __new_nstart = _M_map + (_M_map_size - __new_num_nodes) / 2 + + (__add_at_front ? __nodes_to_add : 0); + if (__new_nstart < _M_start._M_node) + copy(_M_start._M_node, _M_finish._M_node + 1, __new_nstart); + else + copy_backward(_M_start._M_node, _M_finish._M_node + 1, + __new_nstart + __old_num_nodes); + } + else { + size_type __new_map_size = + _M_map_size + max(_M_map_size, __nodes_to_add) + 2; + + _Map_pointer __new_map = _M_allocate_map(__new_map_size); + __new_nstart = __new_map + (__new_map_size - __new_num_nodes) / 2 + + (__add_at_front ? __nodes_to_add : 0); + copy(_M_start._M_node, _M_finish._M_node + 1, __new_nstart); + _M_deallocate_map(_M_map, _M_map_size); + + _M_map = __new_map; + _M_map_size = __new_map_size; + } + + _M_start._M_set_node(__new_nstart); + _M_finish._M_set_node(__new_nstart + __old_num_nodes - 1); +} + + +// Nonmember functions. + +template <class _Tp, class _Alloc> +inline bool operator==(const deque<_Tp, _Alloc>& __x, + const deque<_Tp, _Alloc>& __y) { + return __x.size() == __y.size() && + equal(__x.begin(), __x.end(), __y.begin()); +} + +template <class _Tp, class _Alloc> +inline bool operator<(const deque<_Tp, _Alloc>& __x, + const deque<_Tp, _Alloc>& __y) { + return lexicographical_compare(__x.begin(), __x.end(), + __y.begin(), __y.end()); +} + +template <class _Tp, class _Alloc> +inline bool operator!=(const deque<_Tp, _Alloc>& __x, + const deque<_Tp, _Alloc>& __y) { + return !(__x == __y); +} + +template <class _Tp, class _Alloc> +inline bool operator>(const deque<_Tp, _Alloc>& __x, + const deque<_Tp, _Alloc>& __y) { + return __y < __x; +} + +template <class _Tp, class _Alloc> +inline bool operator<=(const deque<_Tp, _Alloc>& __x, + const deque<_Tp, _Alloc>& __y) { + return !(__y < __x); +} +template <class _Tp, class _Alloc> +inline bool operator>=(const deque<_Tp, _Alloc>& __x, + const deque<_Tp, _Alloc>& __y) { + return !(__x < __y); +} + +template <class _Tp, class _Alloc> +inline void swap(deque<_Tp,_Alloc>& __x, deque<_Tp,_Alloc>& __y) { + __x.swap(__y); +} + +} // namespace std + +#endif /* __GLIBCPP_INTERNAL_DEQUE_H */ + |