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00065 #ifndef __GLIBCPP_INTERNAL_ITERATOR_H
00066 #define __GLIBCPP_INTERNAL_ITERATOR_H
00067
00068 namespace std
00069 {
00070
00089 template<typename _Iterator>
00090 class reverse_iterator
00091 : public iterator<typename iterator_traits<_Iterator>::iterator_category,
00092 typename iterator_traits<_Iterator>::value_type,
00093 typename iterator_traits<_Iterator>::difference_type,
00094 typename iterator_traits<_Iterator>::pointer,
00095 typename iterator_traits<_Iterator>::reference>
00096 {
00097 protected:
00098 _Iterator current;
00099
00100 public:
00101 typedef _Iterator iterator_type;
00102 typedef typename iterator_traits<_Iterator>::difference_type
00103 difference_type;
00104 typedef typename iterator_traits<_Iterator>::reference reference;
00105 typedef typename iterator_traits<_Iterator>::pointer pointer;
00106
00107 public:
00111 reverse_iterator() { }
00112
00116 explicit
00117 reverse_iterator(iterator_type __x) : current(__x) { }
00118
00122 reverse_iterator(const reverse_iterator& __x)
00123 : current(__x.current) { }
00124
00129 template<typename _Iter>
00130 reverse_iterator(const reverse_iterator<_Iter>& __x)
00131 : current(__x.base()) { }
00132
00136 iterator_type
00137 base() const { return current; }
00138
00144 reference
00145 operator*() const
00146 {
00147 _Iterator __tmp = current;
00148 return *--__tmp;
00149 }
00150
00156 pointer
00157 operator->() const { return &(operator*()); }
00158
00164 reverse_iterator&
00165 operator++()
00166 {
00167 --current;
00168 return *this;
00169 }
00170
00176 reverse_iterator
00177 operator++(int)
00178 {
00179 reverse_iterator __tmp = *this;
00180 --current;
00181 return __tmp;
00182 }
00183
00189 reverse_iterator&
00190 operator--()
00191 {
00192 ++current;
00193 return *this;
00194 }
00195
00201 reverse_iterator operator--(int)
00202 {
00203 reverse_iterator __tmp = *this;
00204 ++current;
00205 return __tmp;
00206 }
00207
00213 reverse_iterator
00214 operator+(difference_type __n) const
00215 { return reverse_iterator(current - __n); }
00216
00222 reverse_iterator&
00223 operator+=(difference_type __n)
00224 {
00225 current -= __n;
00226 return *this;
00227 }
00228
00234 reverse_iterator
00235 operator-(difference_type __n) const
00236 { return reverse_iterator(current + __n); }
00237
00243 reverse_iterator&
00244 operator-=(difference_type __n)
00245 {
00246 current += __n;
00247 return *this;
00248 }
00249
00255 reference
00256 operator[](difference_type __n) const { return *(*this + __n); }
00257 };
00258
00260
00269 template<typename _Iterator>
00270 inline bool
00271 operator==(const reverse_iterator<_Iterator>& __x,
00272 const reverse_iterator<_Iterator>& __y)
00273 { return __x.base() == __y.base(); }
00274
00275 template<typename _Iterator>
00276 inline bool
00277 operator<(const reverse_iterator<_Iterator>& __x,
00278 const reverse_iterator<_Iterator>& __y)
00279 { return __y.base() < __x.base(); }
00280
00281 template<typename _Iterator>
00282 inline bool
00283 operator!=(const reverse_iterator<_Iterator>& __x,
00284 const reverse_iterator<_Iterator>& __y)
00285 { return !(__x == __y); }
00286
00287 template<typename _Iterator>
00288 inline bool
00289 operator>(const reverse_iterator<_Iterator>& __x,
00290 const reverse_iterator<_Iterator>& __y)
00291 { return __y < __x; }
00292
00293 template<typename _Iterator>
00294 inline bool
00295 operator<=(const reverse_iterator<_Iterator>& __x,
00296 const reverse_iterator<_Iterator>& __y)
00297 { return !(__y < __x); }
00298
00299 template<typename _Iterator>
00300 inline bool
00301 operator>=(const reverse_iterator<_Iterator>& __x,
00302 const reverse_iterator<_Iterator>& __y)
00303 { return !(__x < __y); }
00304
00305 template<typename _Iterator>
00306 inline typename reverse_iterator<_Iterator>::difference_type
00307 operator-(const reverse_iterator<_Iterator>& __x,
00308 const reverse_iterator<_Iterator>& __y)
00309 { return __y.base() - __x.base(); }
00310
00311 template<typename _Iterator>
00312 inline reverse_iterator<_Iterator>
00313 operator+(typename reverse_iterator<_Iterator>::difference_type __n,
00314 const reverse_iterator<_Iterator>& __x)
00315 { return reverse_iterator<_Iterator>(__x.base() - __n); }
00317
00318
00327 template<typename _Container>
00328 class back_insert_iterator
00329 : public iterator<output_iterator_tag, void, void, void, void>
00330 {
00331 protected:
00332 _Container* container;
00333
00334 public:
00336 typedef _Container container_type;
00337
00339 explicit
00340 back_insert_iterator(_Container& __x) : container(&__x) { }
00341
00353 back_insert_iterator&
00354 operator=(typename _Container::const_reference __value)
00355 {
00356 container->push_back(__value);
00357 return *this;
00358 }
00359
00361 back_insert_iterator&
00362 operator*() { return *this; }
00363
00365 back_insert_iterator&
00366 operator++() { return *this; }
00367
00369 back_insert_iterator
00370 operator++(int) { return *this; }
00371 };
00372
00384 template<typename _Container>
00385 inline back_insert_iterator<_Container>
00386 back_inserter(_Container& __x)
00387 { return back_insert_iterator<_Container>(__x); }
00388
00397 template<typename _Container>
00398 class front_insert_iterator
00399 : public iterator<output_iterator_tag, void, void, void, void>
00400 {
00401 protected:
00402 _Container* container;
00403
00404 public:
00406 typedef _Container container_type;
00407
00409 explicit front_insert_iterator(_Container& __x) : container(&__x) { }
00410
00422 front_insert_iterator&
00423 operator=(typename _Container::const_reference __value)
00424 {
00425 container->push_front(__value);
00426 return *this;
00427 }
00428
00430 front_insert_iterator&
00431 operator*() { return *this; }
00432
00434 front_insert_iterator&
00435 operator++() { return *this; }
00436
00438 front_insert_iterator
00439 operator++(int) { return *this; }
00440 };
00441
00453 template<typename _Container>
00454 inline front_insert_iterator<_Container>
00455 front_inserter(_Container& __x)
00456 { return front_insert_iterator<_Container>(__x); }
00457
00470 template<typename _Container>
00471 class insert_iterator
00472 : public iterator<output_iterator_tag, void, void, void, void>
00473 {
00474 protected:
00475 _Container* container;
00476 typename _Container::iterator iter;
00477
00478 public:
00480 typedef _Container container_type;
00481
00486 insert_iterator(_Container& __x, typename _Container::iterator __i)
00487 : container(&__x), iter(__i) {}
00488
00512 insert_iterator&
00513 operator=(const typename _Container::const_reference __value)
00514 {
00515 iter = container->insert(iter, __value);
00516 ++iter;
00517 return *this;
00518 }
00519
00521 insert_iterator&
00522 operator*() { return *this; }
00523
00525 insert_iterator&
00526 operator++() { return *this; }
00527
00529 insert_iterator&
00530 operator++(int) { return *this; }
00531 };
00532
00544 template<typename _Container, typename _Iterator>
00545 inline insert_iterator<_Container>
00546 inserter(_Container& __x, _Iterator __i)
00547 {
00548 return insert_iterator<_Container>(__x,
00549 typename _Container::iterator(__i));
00550 }
00551 }
00552
00553 namespace __gnu_cxx
00554 {
00555
00556
00557
00558
00559
00560
00561
00562 using std::iterator_traits;
00563 using std::iterator;
00564 template<typename _Iterator, typename _Container>
00565 class __normal_iterator
00566 : public iterator<typename iterator_traits<_Iterator>::iterator_category,
00567 typename iterator_traits<_Iterator>::value_type,
00568 typename iterator_traits<_Iterator>::difference_type,
00569 typename iterator_traits<_Iterator>::pointer,
00570 typename iterator_traits<_Iterator>::reference>
00571 {
00572 protected:
00573 _Iterator _M_current;
00574
00575 public:
00576 typedef typename iterator_traits<_Iterator>::difference_type
00577 difference_type;
00578 typedef typename iterator_traits<_Iterator>::reference reference;
00579 typedef typename iterator_traits<_Iterator>::pointer pointer;
00580
00581 __normal_iterator() : _M_current(_Iterator()) { }
00582
00583 explicit
00584 __normal_iterator(const _Iterator& __i) : _M_current(__i) { }
00585
00586
00587 template<typename _Iter>
00588 inline __normal_iterator(const __normal_iterator<_Iter, _Container>& __i)
00589 : _M_current(__i.base()) { }
00590
00591
00592 reference
00593 operator*() const { return *_M_current; }
00594
00595 pointer
00596 operator->() const { return _M_current; }
00597
00598 __normal_iterator&
00599 operator++() { ++_M_current; return *this; }
00600
00601 __normal_iterator
00602 operator++(int) { return __normal_iterator(_M_current++); }
00603
00604
00605 __normal_iterator&
00606 operator--() { --_M_current; return *this; }
00607
00608 __normal_iterator
00609 operator--(int) { return __normal_iterator(_M_current--); }
00610
00611
00612 reference
00613 operator[](const difference_type& __n) const
00614 { return _M_current[__n]; }
00615
00616 __normal_iterator&
00617 operator+=(const difference_type& __n)
00618 { _M_current += __n; return *this; }
00619
00620 __normal_iterator
00621 operator+(const difference_type& __n) const
00622 { return __normal_iterator(_M_current + __n); }
00623
00624 __normal_iterator&
00625 operator-=(const difference_type& __n)
00626 { _M_current -= __n; return *this; }
00627
00628 __normal_iterator
00629 operator-(const difference_type& __n) const
00630 { return __normal_iterator(_M_current - __n); }
00631
00632 difference_type
00633 operator-(const __normal_iterator& __i) const
00634 { return _M_current - __i._M_current; }
00635
00636 const _Iterator&
00637 base() const { return _M_current; }
00638 };
00639
00640
00641
00642
00643
00644
00645
00646
00647
00648
00649 template<typename _IteratorL, typename _IteratorR, typename _Container>
00650 inline bool
00651 operator==(const __normal_iterator<_IteratorL, _Container>& __lhs,
00652 const __normal_iterator<_IteratorR, _Container>& __rhs)
00653 { return __lhs.base() == __rhs.base(); }
00654
00655 template<typename _Iterator, typename _Container>
00656 inline bool
00657 operator==(const __normal_iterator<_Iterator, _Container>& __lhs,
00658 const __normal_iterator<_Iterator, _Container>& __rhs)
00659 { return __lhs.base() == __rhs.base(); }
00660
00661 template<typename _IteratorL, typename _IteratorR, typename _Container>
00662 inline bool
00663 operator!=(const __normal_iterator<_IteratorL, _Container>& __lhs,
00664 const __normal_iterator<_IteratorR, _Container>& __rhs)
00665 { return __lhs.base() != __rhs.base(); }
00666
00667 template<typename _Iterator, typename _Container>
00668 inline bool
00669 operator!=(const __normal_iterator<_Iterator, _Container>& __lhs,
00670 const __normal_iterator<_Iterator, _Container>& __rhs)
00671 { return __lhs.base() != __rhs.base(); }
00672
00673
00674 template<typename _IteratorL, typename _IteratorR, typename _Container>
00675 inline bool
00676 operator<(const __normal_iterator<_IteratorL, _Container>& __lhs,
00677 const __normal_iterator<_IteratorR, _Container>& __rhs)
00678 { return __lhs.base() < __rhs.base(); }
00679
00680 template<typename _Iterator, typename _Container>
00681 inline bool
00682 operator<(const __normal_iterator<_Iterator, _Container>& __lhs,
00683 const __normal_iterator<_Iterator, _Container>& __rhs)
00684 { return __lhs.base() < __rhs.base(); }
00685
00686 template<typename _IteratorL, typename _IteratorR, typename _Container>
00687 inline bool
00688 operator>(const __normal_iterator<_IteratorL, _Container>& __lhs,
00689 const __normal_iterator<_IteratorR, _Container>& __rhs)
00690 { return __lhs.base() > __rhs.base(); }
00691
00692 template<typename _Iterator, typename _Container>
00693 inline bool
00694 operator>(const __normal_iterator<_Iterator, _Container>& __lhs,
00695 const __normal_iterator<_Iterator, _Container>& __rhs)
00696 { return __lhs.base() > __rhs.base(); }
00697
00698 template<typename _IteratorL, typename _IteratorR, typename _Container>
00699 inline bool
00700 operator<=(const __normal_iterator<_IteratorL, _Container>& __lhs,
00701 const __normal_iterator<_IteratorR, _Container>& __rhs)
00702 { return __lhs.base() <= __rhs.base(); }
00703
00704 template<typename _Iterator, typename _Container>
00705 inline bool
00706 operator<=(const __normal_iterator<_Iterator, _Container>& __lhs,
00707 const __normal_iterator<_Iterator, _Container>& __rhs)
00708 { return __lhs.base() <= __rhs.base(); }
00709
00710 template<typename _IteratorL, typename _IteratorR, typename _Container>
00711 inline bool
00712 operator>=(const __normal_iterator<_IteratorL, _Container>& __lhs,
00713 const __normal_iterator<_IteratorR, _Container>& __rhs)
00714 { return __lhs.base() >= __rhs.base(); }
00715
00716 template<typename _Iterator, typename _Container>
00717 inline bool
00718 operator>=(const __normal_iterator<_Iterator, _Container>& __lhs,
00719 const __normal_iterator<_Iterator, _Container>& __rhs)
00720 { return __lhs.base() >= __rhs.base(); }
00721
00722 template<typename _Iterator, typename _Container>
00723 inline __normal_iterator<_Iterator, _Container>
00724 operator+(typename __normal_iterator<_Iterator, _Container>::difference_type __n,
00725 const __normal_iterator<_Iterator, _Container>& __i)
00726 { return __normal_iterator<_Iterator, _Container>(__i.base() + __n); }
00727 }
00728
00729 #endif
00730
00731
00732
00733