forked from KolibriOS/kolibrios
549 lines
17 KiB
C
549 lines
17 KiB
C
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/*
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*
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* Copyright (c) 1994
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* Hewlett-Packard Company
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*
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* Permission to use, copy, modify, distribute and sell this software
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* and its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies and
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* that both that copyright notice and this permission notice appear
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* in supporting documentation. Hewlett-Packard Company makes no
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* representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied warranty.
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*
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*
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* Copyright (c) 1996-1998
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* Silicon Graphics Computer Systems, Inc.
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*
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* Permission to use, copy, modify, distribute and sell this software
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* and its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies and
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* that both that copyright notice and this permission notice appear
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* in supporting documentation. Silicon Graphics makes no
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* representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied warranty.
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*/
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/* NOTE: This is an internal header file, included by other STL headers.
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* You should not attempt to use it directly.
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*/
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#ifndef __SGI_STL_INTERNAL_ITERATOR_H
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#define __SGI_STL_INTERNAL_ITERATOR_H
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namespace std
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{
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template <class _Container>
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class back_insert_iterator {
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protected:
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_Container* container;
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public:
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typedef _Container container_type;
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typedef output_iterator_tag iterator_category;
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typedef void value_type;
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typedef void difference_type;
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typedef void pointer;
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typedef void reference;
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explicit back_insert_iterator(_Container& __x) : container(&__x) {}
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back_insert_iterator<_Container>&
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operator=(const typename _Container::value_type& __value) {
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container->push_back(__value);
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return *this;
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}
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back_insert_iterator<_Container>& operator*() { return *this; }
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back_insert_iterator<_Container>& operator++() { return *this; }
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back_insert_iterator<_Container>& operator++(int) { return *this; }
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};
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template <class _Container>
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inline back_insert_iterator<_Container> back_inserter(_Container& __x) {
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return back_insert_iterator<_Container>(__x);
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}
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template <class _Container>
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class front_insert_iterator {
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protected:
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_Container* container;
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public:
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typedef _Container container_type;
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typedef output_iterator_tag iterator_category;
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typedef void value_type;
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typedef void difference_type;
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typedef void pointer;
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typedef void reference;
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explicit front_insert_iterator(_Container& __x) : container(&__x) {}
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front_insert_iterator<_Container>&
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operator=(const typename _Container::value_type& __value) {
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container->push_front(__value);
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return *this;
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}
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front_insert_iterator<_Container>& operator*() { return *this; }
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front_insert_iterator<_Container>& operator++() { return *this; }
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front_insert_iterator<_Container>& operator++(int) { return *this; }
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};
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template <class _Container>
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inline front_insert_iterator<_Container> front_inserter(_Container& __x) {
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return front_insert_iterator<_Container>(__x);
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}
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template <class _Container>
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class insert_iterator {
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protected:
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_Container* container;
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typename _Container::iterator iter;
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public:
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typedef _Container container_type;
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typedef output_iterator_tag iterator_category;
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typedef void value_type;
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typedef void difference_type;
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typedef void pointer;
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typedef void reference;
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insert_iterator(_Container& __x, typename _Container::iterator __i)
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: container(&__x), iter(__i) {}
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insert_iterator<_Container>&
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operator=(const typename _Container::value_type& __value) {
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iter = container->insert(iter, __value);
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++iter;
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return *this;
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}
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insert_iterator<_Container>& operator*() { return *this; }
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insert_iterator<_Container>& operator++() { return *this; }
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insert_iterator<_Container>& operator++(int) { return *this; }
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};
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template <class _Container, class _Iterator>
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inline
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insert_iterator<_Container> inserter(_Container& __x, _Iterator __i)
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{
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typedef typename _Container::iterator __iter;
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return insert_iterator<_Container>(__x, __iter(__i));
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}
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template <class _BidirectionalIterator, class _Tp, class _Reference = _Tp&,
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class _Distance = ptrdiff_t>
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class reverse_bidirectional_iterator {
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typedef reverse_bidirectional_iterator<_BidirectionalIterator, _Tp,
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_Reference, _Distance> _Self;
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protected:
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_BidirectionalIterator current;
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public:
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typedef bidirectional_iterator_tag iterator_category;
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typedef _Tp value_type;
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typedef _Distance difference_type;
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typedef _Tp* pointer;
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typedef _Reference reference;
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reverse_bidirectional_iterator() {}
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explicit reverse_bidirectional_iterator(_BidirectionalIterator __x)
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: current(__x) {}
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_BidirectionalIterator base() const { return current; }
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_Reference operator*() const {
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_BidirectionalIterator __tmp = current;
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return *--__tmp;
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}
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pointer operator->() const { return &(operator*()); }
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_Self& operator++() {
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--current;
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return *this;
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}
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_Self operator++(int) {
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_Self __tmp = *this;
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--current;
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return __tmp;
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}
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_Self& operator--() {
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++current;
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return *this;
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}
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_Self operator--(int) {
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_Self __tmp = *this;
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++current;
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return __tmp;
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}
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};
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template <class _BiIter, class _Tp, class _Ref, class _Distance>
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inline bool operator==(
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const reverse_bidirectional_iterator<_BiIter, _Tp, _Ref, _Distance>& __x,
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const reverse_bidirectional_iterator<_BiIter, _Tp, _Ref, _Distance>& __y)
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{
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return __x.base() == __y.base();
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}
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template <class _BiIter, class _Tp, class _Ref, class _Distance>
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inline bool operator!=(
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const reverse_bidirectional_iterator<_BiIter, _Tp, _Ref, _Distance>& __x,
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const reverse_bidirectional_iterator<_BiIter, _Tp, _Ref, _Distance>& __y)
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{
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return !(__x == __y);
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}
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// This is the new version of reverse_iterator, as defined in the
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// draft C++ standard. It relies on the iterator_traits template,
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// which in turn relies on partial specialization. The class
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// reverse_bidirectional_iterator is no longer part of the draft
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// standard, but it is retained for backward compatibility.
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template <class _Iterator>
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class reverse_iterator
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{
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protected:
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_Iterator current;
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public:
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typedef typename iterator_traits<_Iterator>::iterator_category
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iterator_category;
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typedef typename iterator_traits<_Iterator>::value_type
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value_type;
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typedef typename iterator_traits<_Iterator>::difference_type
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difference_type;
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typedef typename iterator_traits<_Iterator>::pointer
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pointer;
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typedef typename iterator_traits<_Iterator>::reference
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reference;
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typedef _Iterator iterator_type;
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typedef reverse_iterator<_Iterator> _Self;
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public:
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reverse_iterator() {}
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explicit reverse_iterator(iterator_type __x) : current(__x) {}
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reverse_iterator(const _Self& __x) : current(__x.current) {}
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template <class _Iter>
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reverse_iterator(const reverse_iterator<_Iter>& __x)
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: current(__x.base()) {}
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iterator_type base() const { return current; }
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reference operator*() const {
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_Iterator __tmp = current;
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return *--__tmp;
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}
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pointer operator->() const { return &(operator*()); }
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_Self& operator++() {
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--current;
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return *this;
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}
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_Self operator++(int) {
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_Self __tmp = *this;
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--current;
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return __tmp;
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}
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_Self& operator--() {
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++current;
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return *this;
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}
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_Self operator--(int) {
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_Self __tmp = *this;
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++current;
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return __tmp;
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}
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_Self operator+(difference_type __n) const {
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return _Self(current - __n);
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}
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_Self& operator+=(difference_type __n) {
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current -= __n;
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return *this;
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}
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_Self operator-(difference_type __n) const {
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return _Self(current + __n);
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}
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_Self& operator-=(difference_type __n) {
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current += __n;
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return *this;
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}
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reference operator[](difference_type __n) const { return *(*this + __n); }
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};
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template <class _Iterator>
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inline bool operator==(const reverse_iterator<_Iterator>& __x,
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const reverse_iterator<_Iterator>& __y) {
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return __x.base() == __y.base();
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}
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template <class _Iterator>
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inline bool operator<(const reverse_iterator<_Iterator>& __x,
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const reverse_iterator<_Iterator>& __y) {
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return __y.base() < __x.base();
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}
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template <class _Iterator>
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inline bool operator!=(const reverse_iterator<_Iterator>& __x,
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const reverse_iterator<_Iterator>& __y) {
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return !(__x == __y);
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}
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template <class _Iterator>
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inline bool operator>(const reverse_iterator<_Iterator>& __x,
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const reverse_iterator<_Iterator>& __y) {
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return __y < __x;
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}
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template <class _Iterator>
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inline bool operator<=(const reverse_iterator<_Iterator>& __x,
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const reverse_iterator<_Iterator>& __y) {
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return !(__y < __x);
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}
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template <class _Iterator>
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inline bool operator>=(const reverse_iterator<_Iterator>& __x,
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const reverse_iterator<_Iterator>& __y) {
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return !(__x < __y);
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}
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template <class _Iterator>
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inline typename reverse_iterator<_Iterator>::difference_type
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operator-(const reverse_iterator<_Iterator>& __x,
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const reverse_iterator<_Iterator>& __y) {
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return __y.base() - __x.base();
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}
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template <class _Iterator>
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inline reverse_iterator<_Iterator>
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operator+(typename reverse_iterator<_Iterator>::difference_type __n,
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const reverse_iterator<_Iterator>& __x) {
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return reverse_iterator<_Iterator>(__x.base() - __n);
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}
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template <class _Tp,
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class _CharT = char, class _Traits = char_traits<_CharT>,
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class _Dist = ptrdiff_t>
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class istream_iterator {
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public:
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typedef _CharT char_type;
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typedef _Traits traits_type;
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typedef basic_istream<_CharT, _Traits> istream_type;
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typedef input_iterator_tag iterator_category;
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typedef _Tp value_type;
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typedef _Dist difference_type;
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typedef const _Tp* pointer;
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typedef const _Tp& reference;
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istream_iterator() : _M_stream(0), _M_ok(false) {}
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istream_iterator(istream_type& __s) : _M_stream(&__s) { _M_read(); }
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reference operator*() const { return _M_value; }
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pointer operator->() const { return &(operator*()); }
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istream_iterator& operator++() {
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_M_read();
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return *this;
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}
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istream_iterator operator++(int) {
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istream_iterator __tmp = *this;
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_M_read();
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return __tmp;
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}
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bool _M_equal(const istream_iterator& __x) const
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{ return (_M_ok == __x._M_ok) && (!_M_ok || _M_stream == __x._M_stream); }
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private:
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istream_type* _M_stream;
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_Tp _M_value;
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bool _M_ok;
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void _M_read() {
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_M_ok = (_M_stream && *_M_stream) ? true : false;
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if (_M_ok) {
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*_M_stream >> _M_value;
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_M_ok = *_M_stream ? true : false;
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}
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}
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};
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template <class _Tp, class _CharT, class _Traits, class _Dist>
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inline bool
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operator==(const istream_iterator<_Tp, _CharT, _Traits, _Dist>& __x,
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const istream_iterator<_Tp, _CharT, _Traits, _Dist>& __y) {
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return __x._M_equal(__y);
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}
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template <class _Tp, class _CharT, class _Traits, class _Dist>
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inline bool
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operator!=(const istream_iterator<_Tp, _CharT, _Traits, _Dist>& __x,
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const istream_iterator<_Tp, _CharT, _Traits, _Dist>& __y) {
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return !__x._M_equal(__y);
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}
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template <class _Tp,
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class _CharT = char, class _Traits = char_traits<_CharT> >
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class ostream_iterator {
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public:
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typedef _CharT char_type;
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typedef _Traits traits_type;
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typedef basic_ostream<_CharT, _Traits> ostream_type;
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typedef output_iterator_tag iterator_category;
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typedef void value_type;
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typedef void difference_type;
|
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typedef void pointer;
|
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typedef void reference;
|
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ostream_iterator(ostream_type& __s) : _M_stream(&__s), _M_string(0) {}
|
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ostream_iterator(ostream_type& __s, const _CharT* __c)
|
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: _M_stream(&__s), _M_string(__c) {}
|
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ostream_iterator<_Tp>& operator=(const _Tp& __value) {
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*_M_stream << __value;
|
||
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if (_M_string) *_M_stream << _M_string;
|
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return *this;
|
||
|
|
}
|
||
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ostream_iterator<_Tp>& operator*() { return *this; }
|
||
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|
ostream_iterator<_Tp>& operator++() { return *this; }
|
||
|
|
ostream_iterator<_Tp>& operator++(int) { return *this; }
|
||
|
|
private:
|
||
|
|
ostream_type* _M_stream;
|
||
|
|
const _CharT* _M_string;
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
// This iterator adapter is 'normal' in the sense that it does not
|
||
|
|
// change the semantics of any of the operators of its itererator
|
||
|
|
// parameter. Its primary purpose is to convert an iterator that is
|
||
|
|
// not a class, e.g. a pointer, into an iterator that is a class.
|
||
|
|
// The _Container parameter exists solely so that different containers
|
||
|
|
// using this template can instantiate different types, even if the
|
||
|
|
// _Iterator parameter is the same.
|
||
|
|
template<typename _Iterator, typename _Container>
|
||
|
|
class __normal_iterator
|
||
|
|
: public iterator<iterator_traits<_Iterator>::iterator_category,
|
||
|
|
iterator_traits<_Iterator>::value_type,
|
||
|
|
iterator_traits<_Iterator>::difference_type,
|
||
|
|
iterator_traits<_Iterator>::pointer,
|
||
|
|
iterator_traits<_Iterator>::reference>
|
||
|
|
{
|
||
|
|
|
||
|
|
protected:
|
||
|
|
_Iterator _M_current;
|
||
|
|
|
||
|
|
public:
|
||
|
|
typedef __normal_iterator<_Iterator, _Container> normal_iterator_type;
|
||
|
|
typedef iterator_traits<_Iterator> __traits_type;
|
||
|
|
typedef typename __traits_type::iterator_category iterator_category;
|
||
|
|
typedef typename __traits_type::value_type value_type;
|
||
|
|
typedef typename __traits_type::difference_type difference_type;
|
||
|
|
typedef typename __traits_type::pointer pointer;
|
||
|
|
typedef typename __traits_type::reference reference;
|
||
|
|
|
||
|
|
__normal_iterator() : _M_current(_Iterator()) { }
|
||
|
|
|
||
|
|
explicit __normal_iterator(const _Iterator& __i) : _M_current(__i) { }
|
||
|
|
|
||
|
|
// Allow iterator to const_iterator conversion
|
||
|
|
template<typename _Iter>
|
||
|
|
inline __normal_iterator(const __normal_iterator<_Iter, _Container>& __i)
|
||
|
|
: _M_current(__i.base()) { }
|
||
|
|
|
||
|
|
// Forward iterator requirements
|
||
|
|
reference
|
||
|
|
operator*() const { return *_M_current; }
|
||
|
|
|
||
|
|
pointer
|
||
|
|
operator->() const { return _M_current; }
|
||
|
|
|
||
|
|
normal_iterator_type&
|
||
|
|
operator++() { ++_M_current; return *this; }
|
||
|
|
|
||
|
|
normal_iterator_type
|
||
|
|
operator++(int) { return __normal_iterator(_M_current++); }
|
||
|
|
|
||
|
|
// Bidirectional iterator requirements
|
||
|
|
normal_iterator_type&
|
||
|
|
operator--() { --_M_current; return *this; }
|
||
|
|
|
||
|
|
normal_iterator_type
|
||
|
|
operator--(int) { return __normal_iterator(_M_current--); }
|
||
|
|
|
||
|
|
// Random access iterator requirements
|
||
|
|
reference
|
||
|
|
operator[](const difference_type& __n) const
|
||
|
|
{ return _M_current[__n]; }
|
||
|
|
|
||
|
|
normal_iterator_type&
|
||
|
|
operator+=(const difference_type& __n)
|
||
|
|
{ _M_current += __n; return *this; }
|
||
|
|
|
||
|
|
normal_iterator_type
|
||
|
|
operator+(const difference_type& __n) const
|
||
|
|
{ return __normal_iterator(_M_current + __n); }
|
||
|
|
|
||
|
|
normal_iterator_type&
|
||
|
|
operator-=(const difference_type& __n)
|
||
|
|
{ _M_current -= __n; return *this; }
|
||
|
|
|
||
|
|
normal_iterator_type
|
||
|
|
operator-(const difference_type& __n) const
|
||
|
|
{ return __normal_iterator(_M_current - __n); }
|
||
|
|
|
||
|
|
difference_type
|
||
|
|
operator-(const normal_iterator_type& __i) const
|
||
|
|
{ return _M_current - __i._M_current; }
|
||
|
|
|
||
|
|
const _Iterator&
|
||
|
|
base() const { return _M_current; }
|
||
|
|
};
|
||
|
|
|
||
|
|
// forward iterator requirements
|
||
|
|
|
||
|
|
template<typename _IteratorL, typename _IteratorR, typename _Container>
|
||
|
|
inline bool
|
||
|
|
operator==(const __normal_iterator<_IteratorL, _Container>& __lhs,
|
||
|
|
const __normal_iterator<_IteratorR, _Container>& __rhs)
|
||
|
|
{ return __lhs.base() == __rhs.base(); }
|
||
|
|
|
||
|
|
template<typename _IteratorL, typename _IteratorR, typename _Container>
|
||
|
|
inline bool
|
||
|
|
operator!=(const __normal_iterator<_IteratorL, _Container>& __lhs,
|
||
|
|
const __normal_iterator<_IteratorR, _Container>& __rhs)
|
||
|
|
{ return !(__lhs == __rhs); }
|
||
|
|
|
||
|
|
// random access iterator requirements
|
||
|
|
|
||
|
|
template<typename _IteratorL, typename _IteratorR, typename _Container>
|
||
|
|
inline bool
|
||
|
|
operator<(const __normal_iterator<_IteratorL, _Container>& __lhs,
|
||
|
|
const __normal_iterator<_IteratorR, _Container>& __rhs)
|
||
|
|
{ return __lhs.base() < __rhs.base(); }
|
||
|
|
|
||
|
|
template<typename _IteratorL, typename _IteratorR, typename _Container>
|
||
|
|
inline bool
|
||
|
|
operator>(const __normal_iterator<_IteratorL, _Container>& __lhs,
|
||
|
|
const __normal_iterator<_IteratorR, _Container>& __rhs)
|
||
|
|
{ return __rhs < __lhs; }
|
||
|
|
|
||
|
|
template<typename _IteratorL, typename _IteratorR, typename _Container>
|
||
|
|
inline bool
|
||
|
|
operator<=(const __normal_iterator<_IteratorL, _Container>& __lhs,
|
||
|
|
const __normal_iterator<_IteratorR, _Container>& __rhs)
|
||
|
|
{ return !(__rhs < __lhs); }
|
||
|
|
|
||
|
|
template<typename _IteratorL, typename _IteratorR, typename _Container>
|
||
|
|
inline bool
|
||
|
|
operator>=(const __normal_iterator<_IteratorL, _Container>& __lhs,
|
||
|
|
const __normal_iterator<_IteratorR, _Container>& __rhs)
|
||
|
|
{ return !(__lhs < __rhs); }
|
||
|
|
|
||
|
|
template<typename _Iterator, typename _Container>
|
||
|
|
inline __normal_iterator<_Iterator, _Container>
|
||
|
|
operator+(__normal_iterator<_Iterator, _Container>::difference_type __n,
|
||
|
|
const __normal_iterator<_Iterator, _Container>& __i)
|
||
|
|
{ return __normal_iterator<_Iterator, _Container>(__i.base() + __n); }
|
||
|
|
|
||
|
|
} // namespace std
|
||
|
|
|
||
|
|
#endif /* __SGI_STL_INTERNAL_ITERATOR_H */
|
||
|
|
|
||
|
|
// Local Variables:
|
||
|
|
// mode:C++
|
||
|
|
// End:
|