[857] | 1 | //
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| 2 | // Boost.Pointer Container
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| 3 | //
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| 4 | // Copyright Thorsten Ottosen 2003-2005. Use, modification and
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| 5 | // distribution is subject to the Boost Software License, Version
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| 6 | // 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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| 7 | // http://www.boost.org/LICENSE_1_0.txt)
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| 8 | //
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| 9 | // For more information, see http://www.boost.org/libs/ptr_container/
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| 10 | //
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| 11 |
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| 12 | #ifndef BOOST_PTR_CONTAINER_DETAIL_VOID_PTR_ITERATOR_HPP
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| 13 | #define BOOST_PTR_CONTAINER_DETAIL_VOID_PTR_ITERATOR_HPP
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| 14 |
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| 15 | #if defined(_MSC_VER) && (_MSC_VER >= 1200)
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| 16 | # pragma once
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| 17 | #endif
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| 18 |
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| 19 | #include <boost/config.hpp>
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| 20 | #include <boost/iterator/iterator_traits.hpp>
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| 21 |
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| 22 | namespace boost
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| 23 | {
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| 24 | //namespace ptr_container_detail
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| 25 | //{
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| 26 | template
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| 27 | <
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| 28 | class VoidIter,
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| 29 | class T
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| 30 | >
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| 31 | class void_ptr_iterator
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| 32 | {
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| 33 | public:
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| 34 | typedef T value_type;
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| 35 | typedef T& reference;
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| 36 | typedef T* pointer;
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| 37 |
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| 38 | typedef BOOST_DEDUCED_TYPENAME iterator_difference<VoidIter>::type
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| 39 | difference_type;
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| 40 | typedef BOOST_DEDUCED_TYPENAME iterator_category<VoidIter>::type
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| 41 | iterator_category;
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| 42 | private:
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| 43 |
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| 44 | VoidIter iter_;
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| 45 |
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| 46 | public:
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| 47 | void_ptr_iterator() : iter_()
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| 48 | { }
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| 49 |
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| 50 | void_ptr_iterator( VoidIter r ) : iter_(r)
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| 51 | { }
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| 52 |
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| 53 | //
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| 54 | // Remark: passing by value breaks vc7.1
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| 55 | //
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| 56 | template< class MutableIterator, class MutableT >
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| 57 | void_ptr_iterator( const void_ptr_iterator<MutableIterator,MutableT>& r )
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| 58 | #ifdef BOOST_NO_SFINAE
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| 59 | : iter_( VoidIter(const_cast<void**>(&*r.base())) )
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| 60 | #else
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| 61 |
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| 62 | : iter_(r.base())
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| 63 | #endif
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| 64 | { }
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| 65 |
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| 66 | T& operator*() const
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| 67 | {
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| 68 | return *static_cast<T*>( *iter_ );
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| 69 | }
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| 70 |
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| 71 | T* operator->() const
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| 72 | {
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| 73 | return static_cast<T*>( *iter_ );
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| 74 | }
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| 75 |
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| 76 | void_ptr_iterator& operator++()
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| 77 | {
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| 78 | ++iter_;
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| 79 | return *this;
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| 80 | }
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| 81 |
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| 82 | void_ptr_iterator operator++(int)
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| 83 | {
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| 84 | void_ptr_iterator res = *this;
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| 85 | ++iter_;
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| 86 | return res;
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| 87 | }
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| 88 |
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| 89 | void_ptr_iterator& operator--()
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| 90 | {
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| 91 | --iter_;
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| 92 | return *this;
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| 93 | }
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| 94 |
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| 95 | void_ptr_iterator operator--(int)
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| 96 | {
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| 97 | void_ptr_iterator res = *this;
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| 98 | --iter_;
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| 99 | return res;
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| 100 | }
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| 101 |
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| 102 | void_ptr_iterator& operator+=( difference_type n )
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| 103 | {
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| 104 | iter_ += n;
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| 105 | return *this;
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| 106 | }
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| 107 |
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| 108 | void_ptr_iterator& operator-=( difference_type n )
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| 109 | {
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| 110 | iter_ -= n;
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| 111 | return *this;
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| 112 | }
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| 113 |
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| 114 | T& operator[]( difference_type n ) const
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| 115 | {
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| 116 | return *static_cast<T*>( *(iter_ + n) );
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| 117 | }
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| 118 |
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| 119 | VoidIter base() const
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| 120 | {
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| 121 | return iter_;
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| 122 | }
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| 123 |
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| 124 | }; // class 'void_ptr_iterator'
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| 125 |
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| 126 | template< class VoidIter, class T >
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| 127 | inline void_ptr_iterator<VoidIter,T>
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| 128 | operator+( void_ptr_iterator<VoidIter,T> l,
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| 129 | BOOST_DEDUCED_TYPENAME void_ptr_iterator<VoidIter,T>::difference_type n )
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| 130 | {
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| 131 | l += n;
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| 132 | return l;
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| 133 | }
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| 134 |
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| 135 | template< class VoidIter, class T >
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| 136 | inline void_ptr_iterator<VoidIter,T>
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| 137 | operator+( BOOST_DEDUCED_TYPENAME void_ptr_iterator<VoidIter,T>::difference_type n,
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| 138 | void_ptr_iterator<VoidIter,T> r )
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| 139 |
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| 140 | {
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| 141 | r += n;
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| 142 | return r;
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| 143 | }
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| 144 |
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| 145 | template< class VoidIter, class T >
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| 146 | inline void_ptr_iterator<VoidIter,T>
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| 147 | operator-( void_ptr_iterator<VoidIter,T> l,
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| 148 | BOOST_DEDUCED_TYPENAME void_ptr_iterator<VoidIter,T>::difference_type n )
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| 149 | {
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| 150 | l -= n;
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| 151 | return l;
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| 152 | }
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| 153 |
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| 154 | template< class VoidIter, class T >
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| 155 | inline void_ptr_iterator<VoidIter,T>
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| 156 | operator-( BOOST_DEDUCED_TYPENAME void_ptr_iterator<VoidIter,T>::difference_type n,
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| 157 | void_ptr_iterator<VoidIter,T> r )
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| 158 |
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| 159 | {
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| 160 | r -= n;
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| 161 | return r;
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| 162 | }
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| 163 |
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| 164 | template< class VoidIter, class T, class VoidIterU, class U >
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| 165 | inline BOOST_DEDUCED_TYPENAME void_ptr_iterator<VoidIter,T>::difference_type
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| 166 | operator-( void_ptr_iterator<VoidIter,T> l,
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| 167 | void_ptr_iterator<VoidIterU,U> r )
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| 168 |
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| 169 | {
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| 170 | return l.base() - r.base();
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| 171 | }
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| 172 |
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| 173 |
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| 174 |
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| 175 | template< class VoidIterT, class T, class VoidIterU, class U >
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| 176 | inline bool operator==( const void_ptr_iterator<VoidIterT,T>& l,
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| 177 | const void_ptr_iterator<VoidIterU,U>& r )
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| 178 | {
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| 179 | return l.base() == r.base();
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| 180 | }
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| 181 |
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| 182 |
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| 183 |
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| 184 | template< class VoidIterT, class T, class VoidIterU, class U >
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| 185 | inline bool operator!=( const void_ptr_iterator<VoidIterT,T>& l,
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| 186 | const void_ptr_iterator<VoidIterU,U>& r )
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| 187 | {
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| 188 | return l.base() != r.base();
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| 189 | }
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| 190 |
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| 191 |
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| 192 |
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| 193 | template< class VoidIterT, class T, class VoidIterU, class U >
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| 194 | inline bool operator<( const void_ptr_iterator<VoidIterT,T>& l,
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| 195 | const void_ptr_iterator<VoidIterU,U>& r )
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| 196 | {
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| 197 | return l.base() < r.base();
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| 198 | }
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| 199 |
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| 200 |
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| 201 |
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| 202 | template< class VoidIterT, class T, class VoidIterU, class U >
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| 203 | inline bool operator<=( const void_ptr_iterator<VoidIterT,T>& l,
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| 204 | const void_ptr_iterator<VoidIterU,U>& r )
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| 205 | {
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| 206 | return l.base() <= r.base();
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| 207 | }
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| 208 |
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| 209 |
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| 210 |
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| 211 | template< class VoidIterT, class T, class VoidIterU, class U >
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| 212 | inline bool operator>( const void_ptr_iterator<VoidIterT,T>& l,
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| 213 | const void_ptr_iterator<VoidIterU,U>& r )
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| 214 | {
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| 215 | return l.base() > r.base();
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| 216 | }
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| 217 |
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| 218 |
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| 219 |
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| 220 | template< class VoidIterT, class T, class VoidIterU, class U >
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| 221 | inline bool operator>=( const void_ptr_iterator<VoidIterT,T>& l,
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| 222 | const void_ptr_iterator<VoidIterU,U>& r )
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| 223 | {
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| 224 | return l.base() >= r.base();
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| 225 | }
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| 226 |
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| 227 | }
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| 228 |
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| 229 | #endif
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